diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechClient.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechClient.java
index 857b22dbbaa6..a07689075c0f 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechClient.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechClient.java
@@ -32,8 +32,11 @@
  * calls that map to API methods. Sample code to get started:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
  *   String languageCode = "languageCode-2092349083";
  *   ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
@@ -69,8 +72,11 @@
  * <p>To customize credentials:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings textToSpeechSettings =
  *     TextToSpeechSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -81,8 +87,11 @@
  * <p>To customize the endpoint:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings textToSpeechSettings =
  *     TextToSpeechSettings.newBuilder().setEndpoint(myEndpoint).build();
  * TextToSpeechClient textToSpeechClient = TextToSpeechClient.create(textToSpeechSettings);
@@ -92,8 +101,11 @@
  * the wire:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings textToSpeechSettings =
  *     TextToSpeechSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -160,8 +172,11 @@ public TextToSpeechStub getStub() {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   String languageCode = "languageCode-2092349083";
    *   ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
@@ -189,8 +204,11 @@ public final ListVoicesResponse listVoices(String languageCode) {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   ListVoicesRequest request =
    *       ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
@@ -212,8 +230,11 @@ public final ListVoicesResponse listVoices(ListVoicesRequest request) {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   ListVoicesRequest request =
    *       ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
@@ -235,8 +256,11 @@ public final UnaryCallable<ListVoicesRequest, ListVoicesResponse> listVoicesCall
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   SynthesisInput input = SynthesisInput.newBuilder().build();
    *   VoiceSelectionParams voice = VoiceSelectionParams.newBuilder().build();
@@ -269,8 +293,11 @@ public final SynthesizeSpeechResponse synthesizeSpeech(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   SynthesizeSpeechRequest request =
    *       SynthesizeSpeechRequest.newBuilder()
@@ -296,8 +323,11 @@ public final SynthesizeSpeechResponse synthesizeSpeech(SynthesizeSpeechRequest r
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   SynthesizeSpeechRequest request =
    *       SynthesizeSpeechRequest.newBuilder()
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java
index 62223287d474..597a342e8ff9 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/TextToSpeechSettings.java
@@ -50,16 +50,16 @@
  * <p>For example, to set the total timeout of listVoices to 30 seconds:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings.Builder textToSpeechSettingsBuilder = TextToSpeechSettings.newBuilder();
  * textToSpeechSettingsBuilder
  *     .listVoicesSettings()
  *     .setRetrySettings(
- *         textToSpeechSettingsBuilder
- *             .listVoicesSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * TextToSpeechSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/package-info.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/package-info.java
index d5ebc4774ec3..a36a7d152517 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/package-info.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/package-info.java
@@ -26,8 +26,11 @@
  * <p>Sample for TextToSpeechClient:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
  *   String languageCode = "languageCode-2092349083";
  *   ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/HttpJsonTextToSpeechStub.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/HttpJsonTextToSpeechStub.java
index 90dac73e2500..3ab1aefb7663 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/HttpJsonTextToSpeechStub.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/HttpJsonTextToSpeechStub.java
@@ -111,7 +111,8 @@ public class HttpJsonTextToSpeechStub extends TextToSpeechStub {
                           })
                       .setRequestBodyExtractor(
                           request ->
-                              ProtoRestSerializer.create().toBody("*", request.toBuilder().build()))
+                              ProtoRestSerializer.create()
+                                  .toBody("*", request.toBuilder().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<SynthesizeSpeechResponse>newBuilder()
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java
index f3bb298554f4..38a86b385acc 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1/stub/TextToSpeechStubSettings.java
@@ -65,17 +65,17 @@
  * <p>For example, to set the total timeout of listVoices to 30 seconds:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechStubSettings.Builder textToSpeechSettingsBuilder =
  *     TextToSpeechStubSettings.newBuilder();
  * textToSpeechSettingsBuilder
  *     .listVoicesSettings()
  *     .setRetrySettings(
- *         textToSpeechSettingsBuilder
- *             .listVoicesSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * TextToSpeechStubSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechClient.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechClient.java
index 6e65afe2a830..d9487e3d035e 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechClient.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechClient.java
@@ -33,8 +33,11 @@
  * calls that map to API methods. Sample code to get started:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
  *   String languageCode = "languageCode-2092349083";
  *   ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
@@ -70,8 +73,11 @@
  * <p>To customize credentials:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings textToSpeechSettings =
  *     TextToSpeechSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -82,8 +88,11 @@
  * <p>To customize the endpoint:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings textToSpeechSettings =
  *     TextToSpeechSettings.newBuilder().setEndpoint(myEndpoint).build();
  * TextToSpeechClient textToSpeechClient = TextToSpeechClient.create(textToSpeechSettings);
@@ -93,8 +102,11 @@
  * the wire:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings textToSpeechSettings =
  *     TextToSpeechSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -162,8 +174,11 @@ public TextToSpeechStub getStub() {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   String languageCode = "languageCode-2092349083";
    *   ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
@@ -191,8 +206,11 @@ public final ListVoicesResponse listVoices(String languageCode) {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   ListVoicesRequest request =
    *       ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
@@ -214,8 +232,11 @@ public final ListVoicesResponse listVoices(ListVoicesRequest request) {
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   ListVoicesRequest request =
    *       ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
@@ -237,8 +258,11 @@ public final UnaryCallable<ListVoicesRequest, ListVoicesResponse> listVoicesCall
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   SynthesisInput input = SynthesisInput.newBuilder().build();
    *   VoiceSelectionParams voice = VoiceSelectionParams.newBuilder().build();
@@ -271,8 +295,11 @@ public final SynthesizeSpeechResponse synthesizeSpeech(
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   SynthesizeSpeechRequest request =
    *       SynthesizeSpeechRequest.newBuilder()
@@ -299,8 +326,11 @@ public final SynthesizeSpeechResponse synthesizeSpeech(SynthesizeSpeechRequest r
    * <p>Sample code:
    *
    * <pre>{@code
-   * // This snippet has been automatically generated for illustrative purposes only.
-   * // It may require modifications to work in your environment.
+   * // This snippet has been automatically generated and should be regarded as a code template only.
+   * // It will require modifications to work:
+   * // - It may require correct/in-range values for request initialization.
+   * // - It may require specifying regional endpoints when creating the service client as shown in
+   * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
    * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
    *   SynthesizeSpeechRequest request =
    *       SynthesizeSpeechRequest.newBuilder()
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java
index beee9277bf7b..53268a439c8c 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/TextToSpeechSettings.java
@@ -50,16 +50,16 @@
  * <p>For example, to set the total timeout of listVoices to 30 seconds:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechSettings.Builder textToSpeechSettingsBuilder = TextToSpeechSettings.newBuilder();
  * textToSpeechSettingsBuilder
  *     .listVoicesSettings()
  *     .setRetrySettings(
- *         textToSpeechSettingsBuilder
- *             .listVoicesSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * TextToSpeechSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/package-info.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/package-info.java
index 266a021a8148..d5ec079725be 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/package-info.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/package-info.java
@@ -26,8 +26,11 @@
  * <p>Sample for TextToSpeechClient:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
  *   String languageCode = "languageCode-2092349083";
  *   ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/HttpJsonTextToSpeechStub.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/HttpJsonTextToSpeechStub.java
index 08d2479374c5..a53e031d01fb 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/HttpJsonTextToSpeechStub.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/HttpJsonTextToSpeechStub.java
@@ -111,7 +111,8 @@ public class HttpJsonTextToSpeechStub extends TextToSpeechStub {
                           })
                       .setRequestBodyExtractor(
                           request ->
-                              ProtoRestSerializer.create().toBody("*", request.toBuilder().build()))
+                              ProtoRestSerializer.create()
+                                  .toBody("*", request.toBuilder().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<SynthesizeSpeechResponse>newBuilder()
diff --git a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java
index 5984309bea2b..63b4039aa7ea 100644
--- a/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java
+++ b/java-texttospeech/google-cloud-texttospeech/src/main/java/com/google/cloud/texttospeech/v1beta1/stub/TextToSpeechStubSettings.java
@@ -65,17 +65,17 @@
  * <p>For example, to set the total timeout of listVoices to 30 seconds:
  *
  * <pre>{@code
- * // This snippet has been automatically generated for illustrative purposes only.
- * // It may require modifications to work in your environment.
+ * // This snippet has been automatically generated and should be regarded as a code template only.
+ * // It will require modifications to work:
+ * // - It may require correct/in-range values for request initialization.
+ * // - It may require specifying regional endpoints when creating the service client as shown in
+ * // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
  * TextToSpeechStubSettings.Builder textToSpeechSettingsBuilder =
  *     TextToSpeechStubSettings.newBuilder();
  * textToSpeechSettingsBuilder
  *     .listVoicesSettings()
  *     .setRetrySettings(
- *         textToSpeechSettingsBuilder
- *             .listVoicesSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * TextToSpeechStubSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java
index d00d45cd750b..38564591d1d4 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java
@@ -27,17 +27,17 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechStubSettings.Builder textToSpeechSettingsBuilder =
         TextToSpeechStubSettings.newBuilder();
     textToSpeechSettingsBuilder
         .listVoicesSettings()
         .setRetrySettings(
-            textToSpeechSettingsBuilder
-                .listVoicesSettings()
-                .getRetrySettings()
-                .toBuilder()
+            textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
                 .setTotalTimeout(Duration.ofSeconds(30))
                 .build());
     TextToSpeechStubSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java
index 044014d5a907..e8fff19ed69a 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetCredentialsProvider() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings textToSpeechSettings =
         TextToSpeechSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java
index a39a792a7839..ffdb9fc54d1b 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java
@@ -27,8 +27,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetCredentialsProvider1() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings textToSpeechSettings =
         TextToSpeechSettings.newBuilder()
             .setTransportChannelProvider(
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetEndpoint.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetEndpoint.java
index fedbd0d682cc..469edfd02734 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetEndpoint.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/create/SyncCreateSetEndpoint.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetEndpoint() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings textToSpeechSettings =
         TextToSpeechSettings.newBuilder().setEndpoint(myEndpoint).build();
     TextToSpeechClient textToSpeechClient = TextToSpeechClient.create(textToSpeechSettings);
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/AsyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/AsyncListVoices.java
index 0f3a4007d553..b4cbf584181d 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/AsyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/AsyncListVoices.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       ListVoicesRequest request =
           ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoices.java
index 3e34ca250d59..e11e893314a4 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoices.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       ListVoicesRequest request =
           ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoicesString.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoicesString.java
index 02ce237ff588..ba17ff32c2bd 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoicesString.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/listvoices/SyncListVoicesString.java
@@ -27,8 +27,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoicesString() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       String languageCode = "languageCode-2092349083";
       ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java
index e15de8aae730..1f7163bbd251 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java
@@ -32,8 +32,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncSynthesizeSpeech() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       SynthesizeSpeechRequest request =
           SynthesizeSpeechRequest.newBuilder()
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java
index 1d127eb37d90..7076daec5895 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java
@@ -31,8 +31,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncSynthesizeSpeech() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       SynthesizeSpeechRequest request =
           SynthesizeSpeechRequest.newBuilder()
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java
index f80442244487..9253bf7d9c88 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java
@@ -31,8 +31,11 @@ public static void main(String[] args) throws Exception {
 
   public static void syncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig()
       throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       SynthesisInput input = SynthesisInput.newBuilder().build();
       VoiceSelectionParams voice = VoiceSelectionParams.newBuilder().build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechsettings/listvoices/SyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechsettings/listvoices/SyncListVoices.java
index c81b5f3e81b2..daa8f85cb51d 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechsettings/listvoices/SyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1/texttospeechsettings/listvoices/SyncListVoices.java
@@ -27,16 +27,16 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings.Builder textToSpeechSettingsBuilder = TextToSpeechSettings.newBuilder();
     textToSpeechSettingsBuilder
         .listVoicesSettings()
         .setRetrySettings(
-            textToSpeechSettingsBuilder
-                .listVoicesSettings()
-                .getRetrySettings()
-                .toBuilder()
+            textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
                 .setTotalTimeout(Duration.ofSeconds(30))
                 .build());
     TextToSpeechSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java
index a9d70ec5a752..7dae70660b8f 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/stub/texttospeechstubsettings/listvoices/SyncListVoices.java
@@ -27,17 +27,17 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechStubSettings.Builder textToSpeechSettingsBuilder =
         TextToSpeechStubSettings.newBuilder();
     textToSpeechSettingsBuilder
         .listVoicesSettings()
         .setRetrySettings(
-            textToSpeechSettingsBuilder
-                .listVoicesSettings()
-                .getRetrySettings()
-                .toBuilder()
+            textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
                 .setTotalTimeout(Duration.ofSeconds(30))
                 .build());
     TextToSpeechStubSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java
index 8d96df8533b5..adca0528009d 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetCredentialsProvider() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings textToSpeechSettings =
         TextToSpeechSettings.newBuilder()
             .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java
index fd63bdd75d86..a988d2d173d4 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetCredentialsProvider1.java
@@ -27,8 +27,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetCredentialsProvider1() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings textToSpeechSettings =
         TextToSpeechSettings.newBuilder()
             .setTransportChannelProvider(
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetEndpoint.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetEndpoint.java
index 41869be55d9b..c716c51b94dd 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetEndpoint.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/create/SyncCreateSetEndpoint.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncCreateSetEndpoint() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings textToSpeechSettings =
         TextToSpeechSettings.newBuilder().setEndpoint(myEndpoint).build();
     TextToSpeechClient textToSpeechClient = TextToSpeechClient.create(textToSpeechSettings);
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/AsyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/AsyncListVoices.java
index abc0e5a3f181..623607c8ae1f 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/AsyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/AsyncListVoices.java
@@ -29,8 +29,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       ListVoicesRequest request =
           ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoices.java
index 20c177694cb3..00bcb00bcecd 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoices.java
@@ -28,8 +28,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       ListVoicesRequest request =
           ListVoicesRequest.newBuilder().setLanguageCode("languageCode-2092349083").build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoicesString.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoicesString.java
index 778e2d8c4d6c..11ef28002489 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoicesString.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/listvoices/SyncListVoicesString.java
@@ -27,8 +27,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoicesString() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       String languageCode = "languageCode-2092349083";
       ListVoicesResponse response = textToSpeechClient.listVoices(languageCode);
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java
index 29cb05afe42b..62940ed00ec0 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/AsyncSynthesizeSpeech.java
@@ -33,8 +33,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void asyncSynthesizeSpeech() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       SynthesizeSpeechRequest request =
           SynthesizeSpeechRequest.newBuilder()
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java
index 70d1c39a05fc..6599f2826c3d 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeech.java
@@ -32,8 +32,11 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncSynthesizeSpeech() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       SynthesizeSpeechRequest request =
           SynthesizeSpeechRequest.newBuilder()
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java
index 476647bb4167..d132c1ac5704 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechclient/synthesizespeech/SyncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig.java
@@ -31,8 +31,11 @@ public static void main(String[] args) throws Exception {
 
   public static void syncSynthesizeSpeechSynthesisinputVoiceselectionparamsAudioconfig()
       throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     try (TextToSpeechClient textToSpeechClient = TextToSpeechClient.create()) {
       SynthesisInput input = SynthesisInput.newBuilder().build();
       VoiceSelectionParams voice = VoiceSelectionParams.newBuilder().build();
diff --git a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechsettings/listvoices/SyncListVoices.java b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechsettings/listvoices/SyncListVoices.java
index 21c84d04b41e..6642548f1970 100644
--- a/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechsettings/listvoices/SyncListVoices.java
+++ b/java-texttospeech/samples/snippets/generated/com/google/cloud/texttospeech/v1beta1/texttospeechsettings/listvoices/SyncListVoices.java
@@ -27,16 +27,16 @@ public static void main(String[] args) throws Exception {
   }
 
   public static void syncListVoices() throws Exception {
-    // This snippet has been automatically generated for illustrative purposes only.
-    // It may require modifications to work in your environment.
+    // This snippet has been automatically generated and should be regarded as a code template only.
+    // It will require modifications to work:
+    // - It may require correct/in-range values for request initialization.
+    // - It may require specifying regional endpoints when creating the service client as shown in
+    // https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
     TextToSpeechSettings.Builder textToSpeechSettingsBuilder = TextToSpeechSettings.newBuilder();
     textToSpeechSettingsBuilder
         .listVoicesSettings()
         .setRetrySettings(
-            textToSpeechSettingsBuilder
-                .listVoicesSettings()
-                .getRetrySettings()
-                .toBuilder()
+            textToSpeechSettingsBuilder.listVoicesSettings().getRetrySettings().toBuilder()
                 .setTotalTimeout(Duration.ofSeconds(30))
                 .build());
     TextToSpeechSettings textToSpeechSettings = textToSpeechSettingsBuilder.build();