diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsClient.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsClient.java
index e4dc3948..af7aca2e 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsClient.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsClient.java
@@ -41,8 +41,11 @@
  * 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
  *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
  *   Execution execution = Execution.newBuilder().build();
@@ -79,8 +82,11 @@
  * <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
  * ExecutionsSettings executionsSettings =
  *     ExecutionsSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -91,8 +97,11 @@
  * <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
  * ExecutionsSettings executionsSettings =
  *     ExecutionsSettings.newBuilder().setEndpoint(myEndpoint).build();
  * ExecutionsClient executionsClient = ExecutionsClient.create(executionsSettings);
@@ -102,8 +111,11 @@
  * 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
  * ExecutionsSettings executionsSettings =
  *     ExecutionsSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -171,8 +183,11 @@ public ExecutionsStub 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
    *   for (Execution element : executionsClient.listExecutions(parent).iterateAll()) {
@@ -202,8 +217,11 @@ public final ListExecutionsPagedResponse listExecutions(WorkflowName parent) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]").toString();
    *   for (Execution element : executionsClient.listExecutions(parent).iterateAll()) {
@@ -230,8 +248,11 @@ public final ListExecutionsPagedResponse listExecutions(String parent) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ListExecutionsRequest request =
    *       ListExecutionsRequest.newBuilder()
@@ -262,8 +283,11 @@ public final ListExecutionsPagedResponse listExecutions(ListExecutionsRequest re
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ListExecutionsRequest request =
    *       ListExecutionsRequest.newBuilder()
@@ -295,8 +319,11 @@ public final ListExecutionsPagedResponse listExecutions(ListExecutionsRequest re
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ListExecutionsRequest request =
    *       ListExecutionsRequest.newBuilder()
@@ -332,8 +359,11 @@ public final ListExecutionsPagedResponse listExecutions(ListExecutionsRequest re
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
    *   Execution execution = Execution.newBuilder().build();
@@ -363,8 +393,11 @@ public final Execution createExecution(WorkflowName parent, Execution execution)
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]").toString();
    *   Execution execution = Execution.newBuilder().build();
@@ -391,8 +424,11 @@ public final Execution createExecution(String parent, Execution execution) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CreateExecutionRequest request =
    *       CreateExecutionRequest.newBuilder()
@@ -417,8 +453,11 @@ public final Execution createExecution(CreateExecutionRequest 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CreateExecutionRequest request =
    *       CreateExecutionRequest.newBuilder()
@@ -442,8 +481,11 @@ public final UnaryCallable<CreateExecutionRequest, Execution> createExecutionCal
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ExecutionName name = ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]");
    *   Execution response = executionsClient.getExecution(name);
@@ -467,8 +509,11 @@ public final Execution getExecution(ExecutionName name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String name =
    *       ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]").toString();
@@ -492,8 +537,11 @@ public final Execution getExecution(String name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   GetExecutionRequest request =
    *       GetExecutionRequest.newBuilder()
@@ -520,8 +568,11 @@ public final Execution getExecution(GetExecutionRequest 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   GetExecutionRequest request =
    *       GetExecutionRequest.newBuilder()
@@ -547,8 +598,11 @@ public final UnaryCallable<GetExecutionRequest, Execution> getExecutionCallable(
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ExecutionName name = ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]");
    *   Execution response = executionsClient.cancelExecution(name);
@@ -572,8 +626,11 @@ public final Execution cancelExecution(ExecutionName name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String name =
    *       ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]").toString();
@@ -597,8 +654,11 @@ public final Execution cancelExecution(String name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CancelExecutionRequest request =
    *       CancelExecutionRequest.newBuilder()
@@ -624,8 +684,11 @@ public final Execution cancelExecution(CancelExecutionRequest 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CancelExecutionRequest request =
    *       CancelExecutionRequest.newBuilder()
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsSettings.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsSettings.java
index 986e5a64..1670e4fc 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsSettings.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/ExecutionsSettings.java
@@ -54,16 +54,16 @@
  * <p>For example, to set the total timeout of createExecution 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
  * ExecutionsSettings.Builder executionsSettingsBuilder = ExecutionsSettings.newBuilder();
  * executionsSettingsBuilder
  *     .createExecutionSettings()
  *     .setRetrySettings(
- *         executionsSettingsBuilder
- *             .createExecutionSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         executionsSettingsBuilder.createExecutionSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * ExecutionsSettings executionsSettings = executionsSettingsBuilder.build();
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/package-info.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/package-info.java
index 6368987b..4ae59963 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/package-info.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/package-info.java
@@ -27,8 +27,11 @@
  * <p>Sample for ExecutionsClient:
  *
  * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
  *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
  *   Execution execution = Execution.newBuilder().build();
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/ExecutionsStubSettings.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/ExecutionsStubSettings.java
index a5f9248a..1045e738 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/ExecutionsStubSettings.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/ExecutionsStubSettings.java
@@ -76,16 +76,16 @@
  * <p>For example, to set the total timeout of createExecution 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
  * ExecutionsStubSettings.Builder executionsSettingsBuilder = ExecutionsStubSettings.newBuilder();
  * executionsSettingsBuilder
  *     .createExecutionSettings()
  *     .setRetrySettings(
- *         executionsSettingsBuilder
- *             .createExecutionSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         executionsSettingsBuilder.createExecutionSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * ExecutionsStubSettings executionsSettings = executionsSettingsBuilder.build();
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/HttpJsonExecutionsStub.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/HttpJsonExecutionsStub.java
index c1f006f8..e9a87788 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/HttpJsonExecutionsStub.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1/stub/HttpJsonExecutionsStub.java
@@ -119,7 +119,7 @@ public class HttpJsonExecutionsStub extends ExecutionsStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("execution", request.getExecution()))
+                                  .toBody("execution", request.getExecution(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Execution>newBuilder()
@@ -189,7 +189,7 @@ public class HttpJsonExecutionsStub extends ExecutionsStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearName().build()))
+                                  .toBody("*", request.toBuilder().clearName().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Execution>newBuilder()
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsClient.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsClient.java
index cd1d50e5..1148eebd 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsClient.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsClient.java
@@ -42,8 +42,11 @@
  * 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
  *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
  *   Execution execution = Execution.newBuilder().build();
@@ -80,8 +83,11 @@
  * <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
  * ExecutionsSettings executionsSettings =
  *     ExecutionsSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -92,8 +98,11 @@
  * <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
  * ExecutionsSettings executionsSettings =
  *     ExecutionsSettings.newBuilder().setEndpoint(myEndpoint).build();
  * ExecutionsClient executionsClient = ExecutionsClient.create(executionsSettings);
@@ -103,8 +112,11 @@
  * 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
  * ExecutionsSettings executionsSettings =
  *     ExecutionsSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -173,8 +185,11 @@ public ExecutionsStub 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
    *   for (Execution element : executionsClient.listExecutions(parent).iterateAll()) {
@@ -204,8 +219,11 @@ public final ListExecutionsPagedResponse listExecutions(WorkflowName parent) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]").toString();
    *   for (Execution element : executionsClient.listExecutions(parent).iterateAll()) {
@@ -232,8 +250,11 @@ public final ListExecutionsPagedResponse listExecutions(String parent) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ListExecutionsRequest request =
    *       ListExecutionsRequest.newBuilder()
@@ -264,8 +285,11 @@ public final ListExecutionsPagedResponse listExecutions(ListExecutionsRequest re
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ListExecutionsRequest request =
    *       ListExecutionsRequest.newBuilder()
@@ -297,8 +321,11 @@ public final ListExecutionsPagedResponse listExecutions(ListExecutionsRequest re
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ListExecutionsRequest request =
    *       ListExecutionsRequest.newBuilder()
@@ -334,8 +361,11 @@ public final ListExecutionsPagedResponse listExecutions(ListExecutionsRequest re
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
    *   Execution execution = Execution.newBuilder().build();
@@ -365,8 +395,11 @@ public final Execution createExecution(WorkflowName parent, Execution execution)
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]").toString();
    *   Execution execution = Execution.newBuilder().build();
@@ -393,8 +426,11 @@ public final Execution createExecution(String parent, Execution execution) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CreateExecutionRequest request =
    *       CreateExecutionRequest.newBuilder()
@@ -419,8 +455,11 @@ public final Execution createExecution(CreateExecutionRequest 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CreateExecutionRequest request =
    *       CreateExecutionRequest.newBuilder()
@@ -444,8 +483,11 @@ public final UnaryCallable<CreateExecutionRequest, Execution> createExecutionCal
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ExecutionName name = ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]");
    *   Execution response = executionsClient.getExecution(name);
@@ -469,8 +511,11 @@ public final Execution getExecution(ExecutionName name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String name =
    *       ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]").toString();
@@ -494,8 +539,11 @@ public final Execution getExecution(String name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   GetExecutionRequest request =
    *       GetExecutionRequest.newBuilder()
@@ -522,8 +570,11 @@ public final Execution getExecution(GetExecutionRequest 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   GetExecutionRequest request =
    *       GetExecutionRequest.newBuilder()
@@ -549,8 +600,11 @@ public final UnaryCallable<GetExecutionRequest, Execution> getExecutionCallable(
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   ExecutionName name = ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]");
    *   Execution response = executionsClient.cancelExecution(name);
@@ -574,8 +628,11 @@ public final Execution cancelExecution(ExecutionName name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   String name =
    *       ExecutionName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]", "[EXECUTION]").toString();
@@ -599,8 +656,11 @@ public final Execution cancelExecution(String name) {
    * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CancelExecutionRequest request =
    *       CancelExecutionRequest.newBuilder()
@@ -626,8 +686,11 @@ public final Execution cancelExecution(CancelExecutionRequest 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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
    *   CancelExecutionRequest request =
    *       CancelExecutionRequest.newBuilder()
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsSettings.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsSettings.java
index 195c1d9a..3277de86 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsSettings.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/ExecutionsSettings.java
@@ -54,16 +54,16 @@
  * <p>For example, to set the total timeout of createExecution 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
  * ExecutionsSettings.Builder executionsSettingsBuilder = ExecutionsSettings.newBuilder();
  * executionsSettingsBuilder
  *     .createExecutionSettings()
  *     .setRetrySettings(
- *         executionsSettingsBuilder
- *             .createExecutionSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         executionsSettingsBuilder.createExecutionSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * ExecutionsSettings executionsSettings = executionsSettingsBuilder.build();
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/package-info.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/package-info.java
index 96afe496..83ba9e60 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/package-info.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/package-info.java
@@ -25,8 +25,11 @@
  * <p>Sample for ExecutionsClient:
  *
  * <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 (ExecutionsClient executionsClient = ExecutionsClient.create()) {
  *   WorkflowName parent = WorkflowName.of("[PROJECT]", "[LOCATION]", "[WORKFLOW]");
  *   Execution execution = Execution.newBuilder().build();
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/ExecutionsStubSettings.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/ExecutionsStubSettings.java
index 60f17195..9faadd0d 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/ExecutionsStubSettings.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/ExecutionsStubSettings.java
@@ -76,16 +76,16 @@
  * <p>For example, to set the total timeout of createExecution 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
  * ExecutionsStubSettings.Builder executionsSettingsBuilder = ExecutionsStubSettings.newBuilder();
  * executionsSettingsBuilder
  *     .createExecutionSettings()
  *     .setRetrySettings(
- *         executionsSettingsBuilder
- *             .createExecutionSettings()
- *             .getRetrySettings()
- *             .toBuilder()
+ *         executionsSettingsBuilder.createExecutionSettings().getRetrySettings().toBuilder()
  *             .setTotalTimeout(Duration.ofSeconds(30))
  *             .build());
  * ExecutionsStubSettings executionsSettings = executionsSettingsBuilder.build();
diff --git a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/HttpJsonExecutionsStub.java b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/HttpJsonExecutionsStub.java
index 238c2e6b..1de884da 100644
--- a/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/HttpJsonExecutionsStub.java
+++ b/google-cloud-workflow-executions/src/main/java/com/google/cloud/workflows/executions/v1beta/stub/HttpJsonExecutionsStub.java
@@ -121,7 +121,7 @@ public class HttpJsonExecutionsStub extends ExecutionsStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("execution", request.getExecution()))
+                                  .toBody("execution", request.getExecution(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Execution>newBuilder()
@@ -192,7 +192,7 @@ public class HttpJsonExecutionsStub extends ExecutionsStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearName().build()))
+                                  .toBody("*", request.toBuilder().clearName().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Execution>newBuilder()