diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/_luis_authoring_client.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/_luis_authoring_client.py
index 1a4854c8b590..185b9453df69 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/_luis_authoring_client.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/_luis_authoring_client.py
@@ -20,7 +20,6 @@
 from .operations import AppsOperations
 from .operations import VersionsOperations
 from .operations import TrainOperations
-from .operations import PermissionsOperations
 from .operations import PatternOperations
 from .operations import SettingsOperations
 from .operations import AzureAccountsOperations
@@ -45,8 +44,6 @@ class LUISAuthoringClient(SDKClient):
     :vartype versions: azure.cognitiveservices.language.luis.authoring.operations.VersionsOperations
     :ivar train: Train operations
     :vartype train: azure.cognitiveservices.language.luis.authoring.operations.TrainOperations
-    :ivar permissions: Permissions operations
-    :vartype permissions: azure.cognitiveservices.language.luis.authoring.operations.PermissionsOperations
     :ivar pattern: Pattern operations
     :vartype pattern: azure.cognitiveservices.language.luis.authoring.operations.PatternOperations
     :ivar settings: Settings operations
@@ -85,8 +82,6 @@ def __init__(
             self._client, self.config, self._serialize, self._deserialize)
         self.train = TrainOperations(
             self._client, self.config, self._serialize, self._deserialize)
-        self.permissions = PermissionsOperations(
-            self._client, self.config, self._serialize, self._deserialize)
         self.pattern = PatternOperations(
             self._client, self.config, self._serialize, self._deserialize)
         self.settings = SettingsOperations(
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_luis_authoring_client_enums.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_luis_authoring_client_enums.py
index f85ad6da8c8e..3bfeb07e7bff 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_luis_authoring_client_enums.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_luis_authoring_client_enums.py
@@ -22,4 +22,5 @@ class TrainingStatus(str, Enum):
 class OperationStatusType(str, Enum):
 
     failed = "Failed"
+    failed = "FAILED"
     success = "Success"
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models.py
index b1e37b4e3af3..3b1472b1ddec 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models.py
@@ -862,6 +862,9 @@ class EntityLabel(Model):
     :type role: str
     :param role_id: The role id for the predicted entity.
     :type role_id: str
+    :param children:
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.EntityLabel]
     """
 
     _validation = {
@@ -876,6 +879,7 @@ class EntityLabel(Model):
         'end_token_index': {'key': 'endTokenIndex', 'type': 'int'},
         'role': {'key': 'role', 'type': 'str'},
         'role_id': {'key': 'roleId', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[EntityLabel]'},
     }
 
     def __init__(self, **kwargs):
@@ -885,6 +889,7 @@ def __init__(self, **kwargs):
         self.end_token_index = kwargs.get('end_token_index', None)
         self.role = kwargs.get('role', None)
         self.role_id = kwargs.get('role_id', None)
+        self.children = kwargs.get('children', None)
 
 
 class EntityLabelObject(Model):
@@ -903,6 +908,9 @@ class EntityLabelObject(Model):
     :type end_char_index: int
     :param role: The role the entity plays in the utterance.
     :type role: str
+    :param children: The identified entities within the example utterance.
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.EntityLabelObject]
     """
 
     _validation = {
@@ -916,6 +924,7 @@ class EntityLabelObject(Model):
         'start_char_index': {'key': 'startCharIndex', 'type': 'int'},
         'end_char_index': {'key': 'endCharIndex', 'type': 'int'},
         'role': {'key': 'role', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[EntityLabelObject]'},
     }
 
     def __init__(self, **kwargs):
@@ -924,6 +933,7 @@ def __init__(self, **kwargs):
         self.start_char_index = kwargs.get('start_char_index', None)
         self.end_char_index = kwargs.get('end_char_index', None)
         self.role = kwargs.get('role', None)
+        self.children = kwargs.get('children', None)
 
 
 class EntityModelCreateObject(Model):
@@ -1065,6 +1075,9 @@ class EntityPrediction(Model):
     :type end_token_index: int
     :param phrase: Required. The actual token(s) that comprise the entity.
     :type phrase: str
+    :param children:
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.EntityPrediction]
     """
 
     _validation = {
@@ -1079,6 +1092,7 @@ class EntityPrediction(Model):
         'start_token_index': {'key': 'startTokenIndex', 'type': 'int'},
         'end_token_index': {'key': 'endTokenIndex', 'type': 'int'},
         'phrase': {'key': 'phrase', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[EntityPrediction]'},
     }
 
     def __init__(self, **kwargs):
@@ -1087,6 +1101,7 @@ def __init__(self, **kwargs):
         self.start_token_index = kwargs.get('start_token_index', None)
         self.end_token_index = kwargs.get('end_token_index', None)
         self.phrase = kwargs.get('phrase', None)
+        self.children = kwargs.get('children', None)
 
 
 class EntityRole(Model):
@@ -1618,6 +1633,9 @@ class JSONEntity(Model):
     :type entity: str
     :param role: The role the entity plays in the utterance.
     :type role: str
+    :param children:
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.JSONEntity]
     """
 
     _validation = {
@@ -1631,6 +1649,7 @@ class JSONEntity(Model):
         'end_pos': {'key': 'endPos', 'type': 'int'},
         'entity': {'key': 'entity', 'type': 'str'},
         'role': {'key': 'role', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[JSONEntity]'},
     }
 
     def __init__(self, **kwargs):
@@ -1639,6 +1658,7 @@ def __init__(self, **kwargs):
         self.end_pos = kwargs.get('end_pos', None)
         self.entity = kwargs.get('entity', None)
         self.role = kwargs.get('role', None)
+        self.children = kwargs.get('children', None)
 
 
 class JSONModelFeature(Model):
@@ -1802,12 +1822,12 @@ class LabelExampleResponse(Model):
     :param utterance_text: The example utterance.
     :type utterance_text: str
     :param example_id: The newly created sample ID.
-    :type example_id: int
+    :type example_id: long
     """
 
     _attribute_map = {
         'utterance_text': {'key': 'UtteranceText', 'type': 'str'},
-        'example_id': {'key': 'ExampleId', 'type': 'int'},
+        'example_id': {'key': 'ExampleId', 'type': 'long'},
     }
 
     def __init__(self, **kwargs):
@@ -2045,17 +2065,21 @@ class ModelFeatureInformation(Model):
     :type model_name: str
     :param feature_name: The name of the feature used.
     :type feature_name: str
+    :param is_required:
+    :type is_required: bool
     """
 
     _attribute_map = {
         'model_name': {'key': 'modelName', 'type': 'str'},
         'feature_name': {'key': 'featureName', 'type': 'str'},
+        'is_required': {'key': 'isRequired', 'type': 'bool'},
     }
 
     def __init__(self, **kwargs):
         super(ModelFeatureInformation, self).__init__(**kwargs)
         self.model_name = kwargs.get('model_name', None)
         self.feature_name = kwargs.get('feature_name', None)
+        self.is_required = kwargs.get('is_required', None)
 
 
 class ModelInfoResponse(Model):
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models_py3.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models_py3.py
index 55e8311dd71d..9685363241b2 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models_py3.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/models/_models_py3.py
@@ -862,6 +862,9 @@ class EntityLabel(Model):
     :type role: str
     :param role_id: The role id for the predicted entity.
     :type role_id: str
+    :param children:
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.EntityLabel]
     """
 
     _validation = {
@@ -876,15 +879,17 @@ class EntityLabel(Model):
         'end_token_index': {'key': 'endTokenIndex', 'type': 'int'},
         'role': {'key': 'role', 'type': 'str'},
         'role_id': {'key': 'roleId', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[EntityLabel]'},
     }
 
-    def __init__(self, *, entity_name: str, start_token_index: int, end_token_index: int, role: str=None, role_id: str=None, **kwargs) -> None:
+    def __init__(self, *, entity_name: str, start_token_index: int, end_token_index: int, role: str=None, role_id: str=None, children=None, **kwargs) -> None:
         super(EntityLabel, self).__init__(**kwargs)
         self.entity_name = entity_name
         self.start_token_index = start_token_index
         self.end_token_index = end_token_index
         self.role = role
         self.role_id = role_id
+        self.children = children
 
 
 class EntityLabelObject(Model):
@@ -903,6 +908,9 @@ class EntityLabelObject(Model):
     :type end_char_index: int
     :param role: The role the entity plays in the utterance.
     :type role: str
+    :param children: The identified entities within the example utterance.
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.EntityLabelObject]
     """
 
     _validation = {
@@ -916,14 +924,16 @@ class EntityLabelObject(Model):
         'start_char_index': {'key': 'startCharIndex', 'type': 'int'},
         'end_char_index': {'key': 'endCharIndex', 'type': 'int'},
         'role': {'key': 'role', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[EntityLabelObject]'},
     }
 
-    def __init__(self, *, entity_name: str, start_char_index: int, end_char_index: int, role: str=None, **kwargs) -> None:
+    def __init__(self, *, entity_name: str, start_char_index: int, end_char_index: int, role: str=None, children=None, **kwargs) -> None:
         super(EntityLabelObject, self).__init__(**kwargs)
         self.entity_name = entity_name
         self.start_char_index = start_char_index
         self.end_char_index = end_char_index
         self.role = role
+        self.children = children
 
 
 class EntityModelCreateObject(Model):
@@ -1065,6 +1075,9 @@ class EntityPrediction(Model):
     :type end_token_index: int
     :param phrase: Required. The actual token(s) that comprise the entity.
     :type phrase: str
+    :param children:
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.EntityPrediction]
     """
 
     _validation = {
@@ -1079,14 +1092,16 @@ class EntityPrediction(Model):
         'start_token_index': {'key': 'startTokenIndex', 'type': 'int'},
         'end_token_index': {'key': 'endTokenIndex', 'type': 'int'},
         'phrase': {'key': 'phrase', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[EntityPrediction]'},
     }
 
-    def __init__(self, *, entity_name: str, start_token_index: int, end_token_index: int, phrase: str, **kwargs) -> None:
+    def __init__(self, *, entity_name: str, start_token_index: int, end_token_index: int, phrase: str, children=None, **kwargs) -> None:
         super(EntityPrediction, self).__init__(**kwargs)
         self.entity_name = entity_name
         self.start_token_index = start_token_index
         self.end_token_index = end_token_index
         self.phrase = phrase
+        self.children = children
 
 
 class EntityRole(Model):
@@ -1618,6 +1633,9 @@ class JSONEntity(Model):
     :type entity: str
     :param role: The role the entity plays in the utterance.
     :type role: str
+    :param children:
+    :type children:
+     list[~azure.cognitiveservices.language.luis.authoring.models.JSONEntity]
     """
 
     _validation = {
@@ -1631,14 +1649,16 @@ class JSONEntity(Model):
         'end_pos': {'key': 'endPos', 'type': 'int'},
         'entity': {'key': 'entity', 'type': 'str'},
         'role': {'key': 'role', 'type': 'str'},
+        'children': {'key': 'children', 'type': '[JSONEntity]'},
     }
 
-    def __init__(self, *, start_pos: int, end_pos: int, entity: str, role: str=None, **kwargs) -> None:
+    def __init__(self, *, start_pos: int, end_pos: int, entity: str, role: str=None, children=None, **kwargs) -> None:
         super(JSONEntity, self).__init__(**kwargs)
         self.start_pos = start_pos
         self.end_pos = end_pos
         self.entity = entity
         self.role = role
+        self.children = children
 
 
 class JSONModelFeature(Model):
@@ -1802,12 +1822,12 @@ class LabelExampleResponse(Model):
     :param utterance_text: The example utterance.
     :type utterance_text: str
     :param example_id: The newly created sample ID.
-    :type example_id: int
+    :type example_id: long
     """
 
     _attribute_map = {
         'utterance_text': {'key': 'UtteranceText', 'type': 'str'},
-        'example_id': {'key': 'ExampleId', 'type': 'int'},
+        'example_id': {'key': 'ExampleId', 'type': 'long'},
     }
 
     def __init__(self, *, utterance_text: str=None, example_id: int=None, **kwargs) -> None:
@@ -2045,17 +2065,21 @@ class ModelFeatureInformation(Model):
     :type model_name: str
     :param feature_name: The name of the feature used.
     :type feature_name: str
+    :param is_required:
+    :type is_required: bool
     """
 
     _attribute_map = {
         'model_name': {'key': 'modelName', 'type': 'str'},
         'feature_name': {'key': 'featureName', 'type': 'str'},
+        'is_required': {'key': 'isRequired', 'type': 'bool'},
     }
 
-    def __init__(self, *, model_name: str=None, feature_name: str=None, **kwargs) -> None:
+    def __init__(self, *, model_name: str=None, feature_name: str=None, is_required: bool=None, **kwargs) -> None:
         super(ModelFeatureInformation, self).__init__(**kwargs)
         self.model_name = model_name
         self.feature_name = feature_name
+        self.is_required = is_required
 
 
 class ModelInfoResponse(Model):
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/__init__.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/__init__.py
index afe29f0d3f6a..0d53c240e247 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/__init__.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/__init__.py
@@ -15,7 +15,6 @@
 from ._apps_operations import AppsOperations
 from ._versions_operations import VersionsOperations
 from ._train_operations import TrainOperations
-from ._permissions_operations import PermissionsOperations
 from ._pattern_operations import PatternOperations
 from ._settings_operations import SettingsOperations
 from ._azure_accounts_operations import AzureAccountsOperations
@@ -27,7 +26,6 @@
     'AppsOperations',
     'VersionsOperations',
     'TrainOperations',
-    'PermissionsOperations',
     'PatternOperations',
     'SettingsOperations',
     'AzureAccountsOperations',
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_examples_operations.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_examples_operations.py
index 444b3a037d5c..a25af3a63958 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_examples_operations.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_examples_operations.py
@@ -36,7 +36,7 @@ def __init__(self, client, config, serializer, deserializer):
         self.config = config
 
     def add(
-            self, app_id, version_id, example_label_object, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, example_label_object, enable_nested_children=False, custom_headers=None, raw=False, **operation_config):
         """Adds a labeled example utterance in a version of the application.
 
         :param app_id: The application ID.
@@ -47,6 +47,8 @@ def add(
          expected intent and entities.
         :type example_label_object:
          ~azure.cognitiveservices.language.luis.authoring.models.ExampleLabelObject
+        :param enable_nested_children: Toggles nested/flat format
+        :type enable_nested_children: bool
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -70,6 +72,8 @@ def add(
 
         # Construct parameters
         query_parameters = {}
+        if enable_nested_children is not None:
+            query_parameters['enableNestedChildren'] = self._serialize.query("enable_nested_children", enable_nested_children, 'bool')
 
         # Construct headers
         header_parameters = {}
@@ -100,7 +104,7 @@ def add(
     add.metadata = {'url': '/apps/{appId}/versions/{versionId}/example'}
 
     def batch(
-            self, app_id, version_id, example_label_object_array, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, example_label_object_array, enable_nested_children=False, custom_headers=None, raw=False, **operation_config):
         """Adds a batch of labeled example utterances to a version of the
         application.
 
@@ -111,6 +115,8 @@ def batch(
         :param example_label_object_array: Array of example utterances.
         :type example_label_object_array:
          list[~azure.cognitiveservices.language.luis.authoring.models.ExampleLabelObject]
+        :param enable_nested_children: Toggles nested/flat format
+        :type enable_nested_children: bool
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -134,6 +140,8 @@ def batch(
 
         # Construct parameters
         query_parameters = {}
+        if enable_nested_children is not None:
+            query_parameters['enableNestedChildren'] = self._serialize.query("enable_nested_children", enable_nested_children, 'bool')
 
         # Construct headers
         header_parameters = {}
@@ -166,7 +174,7 @@ def batch(
     batch.metadata = {'url': '/apps/{appId}/versions/{versionId}/examples'}
 
     def list(
-            self, app_id, version_id, skip=0, take=100, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, skip=0, take=100, enable_nested_children=False, custom_headers=None, raw=False, **operation_config):
         """Returns example utterances to be reviewed from a version of the
         application.
 
@@ -179,6 +187,8 @@ def list(
         :param take: The number of entries to return. Maximum page size is
          500. Default is 100.
         :type take: int
+        :param enable_nested_children: Toggles nested/flat format
+        :type enable_nested_children: bool
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -206,6 +216,8 @@ def list(
             query_parameters['skip'] = self._serialize.query("skip", skip, 'int', minimum=0)
         if take is not None:
             query_parameters['take'] = self._serialize.query("take", take, 'int', maximum=500, minimum=0)
+        if enable_nested_children is not None:
+            query_parameters['enableNestedChildren'] = self._serialize.query("enable_nested_children", enable_nested_children, 'bool')
 
         # Construct headers
         header_parameters = {}
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_features_operations.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_features_operations.py
index 1b7b477b3311..1843ed6e9d01 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_features_operations.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_features_operations.py
@@ -421,7 +421,7 @@ def delete_phrase_list(
     delete_phrase_list.metadata = {'url': '/apps/{appId}/versions/{versionId}/phraselists/{phraselistId}'}
 
     def add_intent_feature(
-            self, app_id, version_id, intent_id, model_name=None, feature_name=None, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, intent_id, feature_relation_create_object, custom_headers=None, raw=False, **operation_config):
         """Adds a new feature relation to be used by the intent in a version of
         the application.
 
@@ -431,10 +431,10 @@ def add_intent_feature(
         :type version_id: str
         :param intent_id: The intent classifier ID.
         :type intent_id: str
-        :param model_name: The name of the model used.
-        :type model_name: str
-        :param feature_name: The name of the feature used.
-        :type feature_name: str
+        :param feature_relation_create_object: A Feature relation information
+         object.
+        :type feature_relation_create_object:
+         ~azure.cognitiveservices.language.luis.authoring.models.ModelFeatureInformation
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -447,8 +447,6 @@ def add_intent_feature(
         :raises:
          :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
         """
-        feature_relation_create_object = models.ModelFeatureInformation(model_name=model_name, feature_name=feature_name)
-
         # Construct URL
         url = self.add_intent_feature.metadata['url']
         path_format_arguments = {
@@ -491,7 +489,7 @@ def add_intent_feature(
     add_intent_feature.metadata = {'url': '/apps/{appId}/versions/{versionId}/intents/{intentId}/features'}
 
     def add_entity_feature(
-            self, app_id, version_id, entity_id, model_name=None, feature_name=None, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, entity_id, feature_relation_create_object, custom_headers=None, raw=False, **operation_config):
         """Adds a new feature relation to be used by the entity in a version of
         the application.
 
@@ -501,10 +499,10 @@ def add_entity_feature(
         :type version_id: str
         :param entity_id: The entity extractor ID.
         :type entity_id: str
-        :param model_name: The name of the model used.
-        :type model_name: str
-        :param feature_name: The name of the feature used.
-        :type feature_name: str
+        :param feature_relation_create_object: A Feature relation information
+         object.
+        :type feature_relation_create_object:
+         ~azure.cognitiveservices.language.luis.authoring.models.ModelFeatureInformation
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -517,8 +515,6 @@ def add_entity_feature(
         :raises:
          :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
         """
-        feature_relation_create_object = models.ModelFeatureInformation(model_name=model_name, feature_name=feature_name)
-
         # Construct URL
         url = self.add_entity_feature.metadata['url']
         path_format_arguments = {
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_model_operations.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_model_operations.py
index d3ced6fec0c8..3cb9ff0f4208 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_model_operations.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_model_operations.py
@@ -1389,7 +1389,7 @@ def replace_intent_features(
     replace_intent_features.metadata = {'url': '/apps/{appId}/versions/{versionId}/intents/{intentId}/features'}
 
     def delete_intent_feature(
-            self, app_id, version_id, intent_id, model_name=None, feature_name=None, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, intent_id, feature_relation_delete_object, custom_headers=None, raw=False, **operation_config):
         """Deletes a relation from the feature relations used by the intent in a
         version of the application.
 
@@ -1399,10 +1399,10 @@ def delete_intent_feature(
         :type version_id: str
         :param intent_id: The intent classifier ID.
         :type intent_id: str
-        :param model_name: The name of the model used.
-        :type model_name: str
-        :param feature_name: The name of the feature used.
-        :type feature_name: str
+        :param feature_relation_delete_object: A feature information object
+         containing the feature relation to delete.
+        :type feature_relation_delete_object:
+         ~azure.cognitiveservices.language.luis.authoring.models.ModelFeatureInformation
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -1415,8 +1415,6 @@ def delete_intent_feature(
         :raises:
          :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
         """
-        feature_relation_delete_object = models.ModelFeatureInformation(model_name=model_name, feature_name=feature_name)
-
         # Construct URL
         url = self.delete_intent_feature.metadata['url']
         path_format_arguments = {
@@ -1587,7 +1585,7 @@ def replace_entity_features(
     replace_entity_features.metadata = {'url': '/apps/{appId}/versions/{versionId}/entities/{entityId}/features'}
 
     def delete_entity_feature(
-            self, app_id, version_id, entity_id, model_name=None, feature_name=None, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, entity_id, feature_relation_delete_object, custom_headers=None, raw=False, **operation_config):
         """Deletes a relation from the feature relations used by the entity in a
         version of the application.
 
@@ -1597,10 +1595,10 @@ def delete_entity_feature(
         :type version_id: str
         :param entity_id: The entity extractor ID.
         :type entity_id: str
-        :param model_name: The name of the model used.
-        :type model_name: str
-        :param feature_name: The name of the feature used.
-        :type feature_name: str
+        :param feature_relation_delete_object: A feature information object
+         containing the feature relation to delete.
+        :type feature_relation_delete_object:
+         ~azure.cognitiveservices.language.luis.authoring.models.ModelFeatureInformation
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -1613,8 +1611,6 @@ def delete_entity_feature(
         :raises:
          :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
         """
-        feature_relation_delete_object = models.ModelFeatureInformation(model_name=model_name, feature_name=feature_name)
-
         # Construct URL
         url = self.delete_entity_feature.metadata['url']
         path_format_arguments = {
@@ -2544,7 +2540,7 @@ def update_sub_list(
     update_sub_list.metadata = {'url': '/apps/{appId}/versions/{versionId}/closedlists/{clEntityId}/sublists/{subListId}'}
 
     def list_intent_suggestions(
-            self, app_id, version_id, intent_id, take=100, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, intent_id, take=100, enable_nested_children=False, custom_headers=None, raw=False, **operation_config):
         """Suggests example utterances that would improve the accuracy of the
         intent model in a version of the application.
 
@@ -2557,6 +2553,8 @@ def list_intent_suggestions(
         :param take: The number of entries to return. Maximum page size is
          500. Default is 100.
         :type take: int
+        :param enable_nested_children: Toggles nested/flat format
+        :type enable_nested_children: bool
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -2583,6 +2581,8 @@ def list_intent_suggestions(
         query_parameters = {}
         if take is not None:
             query_parameters['take'] = self._serialize.query("take", take, 'int', maximum=500, minimum=0)
+        if enable_nested_children is not None:
+            query_parameters['enableNestedChildren'] = self._serialize.query("enable_nested_children", enable_nested_children, 'bool')
 
         # Construct headers
         header_parameters = {}
@@ -2609,7 +2609,7 @@ def list_intent_suggestions(
     list_intent_suggestions.metadata = {'url': '/apps/{appId}/versions/{versionId}/intents/{intentId}/suggest'}
 
     def list_entity_suggestions(
-            self, app_id, version_id, entity_id, take=100, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, entity_id, take=100, enable_nested_children=False, custom_headers=None, raw=False, **operation_config):
         """Get suggested example utterances that would improve the accuracy of the
         entity model in a version of the application.
 
@@ -2622,6 +2622,8 @@ def list_entity_suggestions(
         :param take: The number of entries to return. Maximum page size is
          500. Default is 100.
         :type take: int
+        :param enable_nested_children: Toggles nested/flat format
+        :type enable_nested_children: bool
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -2648,6 +2650,8 @@ def list_entity_suggestions(
         query_parameters = {}
         if take is not None:
             query_parameters['take'] = self._serialize.query("take", take, 'int', maximum=500, minimum=0)
+        if enable_nested_children is not None:
+            query_parameters['enableNestedChildren'] = self._serialize.query("enable_nested_children", enable_nested_children, 'bool')
 
         # Construct headers
         header_parameters = {}
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_permissions_operations.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_permissions_operations.py
deleted file mode 100644
index 2050f431a60d..000000000000
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_permissions_operations.py
+++ /dev/null
@@ -1,277 +0,0 @@
-# coding=utf-8
-# --------------------------------------------------------------------------
-# Copyright (c) Microsoft Corporation. All rights reserved.
-# Licensed under the MIT License. See License.txt in the project root for
-# license information.
-#
-# Code generated by Microsoft (R) AutoRest Code Generator.
-# Changes may cause incorrect behavior and will be lost if the code is
-# regenerated.
-# --------------------------------------------------------------------------
-
-from msrest.pipeline import ClientRawResponse
-
-from .. import models
-
-
-class PermissionsOperations(object):
-    """PermissionsOperations operations.
-
-    You should not instantiate directly this class, but create a Client instance that will create it for you and attach it as attribute.
-
-    :param client: Client for service requests.
-    :param config: Configuration of service client.
-    :param serializer: An object model serializer.
-    :param deserializer: An object model deserializer.
-    """
-
-    models = models
-
-    def __init__(self, client, config, serializer, deserializer):
-
-        self._client = client
-        self._serialize = serializer
-        self._deserialize = deserializer
-
-        self.config = config
-
-    def list(
-            self, app_id, custom_headers=None, raw=False, **operation_config):
-        """Gets the list of user emails that have permissions to access your
-        application.
-
-        :param app_id: The application ID.
-        :type app_id: str
-        :param dict custom_headers: headers that will be added to the request
-        :param bool raw: returns the direct response alongside the
-         deserialized response
-        :param operation_config: :ref:`Operation configuration
-         overrides<msrest:optionsforoperations>`.
-        :return: UserAccessList or ClientRawResponse if raw=true
-        :rtype:
-         ~azure.cognitiveservices.language.luis.authoring.models.UserAccessList
-         or ~msrest.pipeline.ClientRawResponse
-        :raises:
-         :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
-        """
-        # Construct URL
-        url = self.list.metadata['url']
-        path_format_arguments = {
-            'Endpoint': self._serialize.url("self.config.endpoint", self.config.endpoint, 'str', skip_quote=True),
-            'appId': self._serialize.url("app_id", app_id, 'str')
-        }
-        url = self._client.format_url(url, **path_format_arguments)
-
-        # Construct parameters
-        query_parameters = {}
-
-        # Construct headers
-        header_parameters = {}
-        header_parameters['Accept'] = 'application/json'
-        if custom_headers:
-            header_parameters.update(custom_headers)
-
-        # Construct and send request
-        request = self._client.get(url, query_parameters, header_parameters)
-        response = self._client.send(request, stream=False, **operation_config)
-
-        if response.status_code not in [200]:
-            raise models.ErrorResponseException(self._deserialize, response)
-
-        deserialized = None
-        if response.status_code == 200:
-            deserialized = self._deserialize('UserAccessList', response)
-
-        if raw:
-            client_raw_response = ClientRawResponse(deserialized, response)
-            return client_raw_response
-
-        return deserialized
-    list.metadata = {'url': '/apps/{appId}/permissions'}
-
-    def add(
-            self, app_id, email=None, custom_headers=None, raw=False, **operation_config):
-        """Adds a user to the allowed list of users to access this LUIS
-        application. Users are added using their email address.
-
-        :param app_id: The application ID.
-        :type app_id: str
-        :param email: The email address of the user.
-        :type email: str
-        :param dict custom_headers: headers that will be added to the request
-        :param bool raw: returns the direct response alongside the
-         deserialized response
-        :param operation_config: :ref:`Operation configuration
-         overrides<msrest:optionsforoperations>`.
-        :return: OperationStatus or ClientRawResponse if raw=true
-        :rtype:
-         ~azure.cognitiveservices.language.luis.authoring.models.OperationStatus
-         or ~msrest.pipeline.ClientRawResponse
-        :raises:
-         :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
-        """
-        user_to_add = models.UserCollaborator(email=email)
-
-        # Construct URL
-        url = self.add.metadata['url']
-        path_format_arguments = {
-            'Endpoint': self._serialize.url("self.config.endpoint", self.config.endpoint, 'str', skip_quote=True),
-            'appId': self._serialize.url("app_id", app_id, 'str')
-        }
-        url = self._client.format_url(url, **path_format_arguments)
-
-        # Construct parameters
-        query_parameters = {}
-
-        # Construct headers
-        header_parameters = {}
-        header_parameters['Accept'] = 'application/json'
-        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
-        if custom_headers:
-            header_parameters.update(custom_headers)
-
-        # Construct body
-        body_content = self._serialize.body(user_to_add, 'UserCollaborator')
-
-        # Construct and send request
-        request = self._client.post(url, query_parameters, header_parameters, body_content)
-        response = self._client.send(request, stream=False, **operation_config)
-
-        if response.status_code not in [200]:
-            raise models.ErrorResponseException(self._deserialize, response)
-
-        deserialized = None
-        if response.status_code == 200:
-            deserialized = self._deserialize('OperationStatus', response)
-
-        if raw:
-            client_raw_response = ClientRawResponse(deserialized, response)
-            return client_raw_response
-
-        return deserialized
-    add.metadata = {'url': '/apps/{appId}/permissions'}
-
-    def delete(
-            self, app_id, email=None, custom_headers=None, raw=False, **operation_config):
-        """Removes a user from the allowed list of users to access this LUIS
-        application. Users are removed using their email address.
-
-        :param app_id: The application ID.
-        :type app_id: str
-        :param email: The email address of the user.
-        :type email: str
-        :param dict custom_headers: headers that will be added to the request
-        :param bool raw: returns the direct response alongside the
-         deserialized response
-        :param operation_config: :ref:`Operation configuration
-         overrides<msrest:optionsforoperations>`.
-        :return: OperationStatus or ClientRawResponse if raw=true
-        :rtype:
-         ~azure.cognitiveservices.language.luis.authoring.models.OperationStatus
-         or ~msrest.pipeline.ClientRawResponse
-        :raises:
-         :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
-        """
-        user_to_delete = models.UserCollaborator(email=email)
-
-        # Construct URL
-        url = self.delete.metadata['url']
-        path_format_arguments = {
-            'Endpoint': self._serialize.url("self.config.endpoint", self.config.endpoint, 'str', skip_quote=True),
-            'appId': self._serialize.url("app_id", app_id, 'str')
-        }
-        url = self._client.format_url(url, **path_format_arguments)
-
-        # Construct parameters
-        query_parameters = {}
-
-        # Construct headers
-        header_parameters = {}
-        header_parameters['Accept'] = 'application/json'
-        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
-        if custom_headers:
-            header_parameters.update(custom_headers)
-
-        # Construct body
-        body_content = self._serialize.body(user_to_delete, 'UserCollaborator')
-
-        # Construct and send request
-        request = self._client.delete(url, query_parameters, header_parameters, body_content)
-        response = self._client.send(request, stream=False, **operation_config)
-
-        if response.status_code not in [200]:
-            raise models.ErrorResponseException(self._deserialize, response)
-
-        deserialized = None
-        if response.status_code == 200:
-            deserialized = self._deserialize('OperationStatus', response)
-
-        if raw:
-            client_raw_response = ClientRawResponse(deserialized, response)
-            return client_raw_response
-
-        return deserialized
-    delete.metadata = {'url': '/apps/{appId}/permissions'}
-
-    def update(
-            self, app_id, emails=None, custom_headers=None, raw=False, **operation_config):
-        """Replaces the current user access list with the new list sent in the
-        body. If an empty list is sent, all access to other users will be
-        removed.
-
-        :param app_id: The application ID.
-        :type app_id: str
-        :param emails: The email address of the users.
-        :type emails: list[str]
-        :param dict custom_headers: headers that will be added to the request
-        :param bool raw: returns the direct response alongside the
-         deserialized response
-        :param operation_config: :ref:`Operation configuration
-         overrides<msrest:optionsforoperations>`.
-        :return: OperationStatus or ClientRawResponse if raw=true
-        :rtype:
-         ~azure.cognitiveservices.language.luis.authoring.models.OperationStatus
-         or ~msrest.pipeline.ClientRawResponse
-        :raises:
-         :class:`ErrorResponseException<azure.cognitiveservices.language.luis.authoring.models.ErrorResponseException>`
-        """
-        collaborators = models.CollaboratorsArray(emails=emails)
-
-        # Construct URL
-        url = self.update.metadata['url']
-        path_format_arguments = {
-            'Endpoint': self._serialize.url("self.config.endpoint", self.config.endpoint, 'str', skip_quote=True),
-            'appId': self._serialize.url("app_id", app_id, 'str')
-        }
-        url = self._client.format_url(url, **path_format_arguments)
-
-        # Construct parameters
-        query_parameters = {}
-
-        # Construct headers
-        header_parameters = {}
-        header_parameters['Accept'] = 'application/json'
-        header_parameters['Content-Type'] = 'application/json; charset=utf-8'
-        if custom_headers:
-            header_parameters.update(custom_headers)
-
-        # Construct body
-        body_content = self._serialize.body(collaborators, 'CollaboratorsArray')
-
-        # Construct and send request
-        request = self._client.put(url, query_parameters, header_parameters, body_content)
-        response = self._client.send(request, stream=False, **operation_config)
-
-        if response.status_code not in [200]:
-            raise models.ErrorResponseException(self._deserialize, response)
-
-        deserialized = None
-        if response.status_code == 200:
-            deserialized = self._deserialize('OperationStatus', response)
-
-        if raw:
-            client_raw_response = ClientRawResponse(deserialized, response)
-            return client_raw_response
-
-        return deserialized
-    update.metadata = {'url': '/apps/{appId}/permissions'}
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_train_operations.py b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_train_operations.py
index c48ed5feb317..cdfc2140a3bf 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_train_operations.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-language-luis/azure/cognitiveservices/language/luis/authoring/operations/_train_operations.py
@@ -36,7 +36,7 @@ def __init__(self, client, config, serializer, deserializer):
         self.config = config
 
     def train_version(
-            self, app_id, version_id, custom_headers=None, raw=False, **operation_config):
+            self, app_id, version_id, mode=None, custom_headers=None, raw=False, **operation_config):
         """Sends a training request for a version of a specified LUIS app. This
         POST request initiates a request asynchronously. To determine whether
         the training request is successful, submit a GET request to get
@@ -49,6 +49,8 @@ def train_version(
         :type app_id: str
         :param version_id: The version ID.
         :type version_id: str
+        :param mode: An enum value specifying mode of training.
+        :type mode: str
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -72,6 +74,8 @@ def train_version(
 
         # Construct parameters
         query_parameters = {}
+        if mode is not None:
+            query_parameters['mode'] = self._serialize.query("mode", mode, 'str')
 
         # Construct headers
         header_parameters = {}