diff --git a/java-bigqueryconnection/README.md b/java-bigqueryconnection/README.md
index 040420500467..e2eb9f8718eb 100644
--- a/java-bigqueryconnection/README.md
+++ b/java-bigqueryconnection/README.md
@@ -27,13 +27,13 @@ If you are using Maven, add this to your pom.xml file:
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-bigqueryconnection:2.5.1'
+implementation 'com.google.cloud:google-cloud-bigqueryconnection:2.5.2'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-bigqueryconnection" % "2.5.1"
+libraryDependencies += "com.google.cloud" % "google-cloud-bigqueryconnection" % "2.5.2"
 ```
 
 ## Authentication
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceClient.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceClient.java
index 1313c9a5fbdd..559a4ea55f16 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceClient.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceClient.java
@@ -44,8 +44,11 @@
  * 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
  *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
  *   ConnectionProto.Connection connection = ConnectionProto.Connection.newBuilder().build();
@@ -85,8 +88,11 @@
  * <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
  * ConnectionServiceSettings connectionServiceSettings =
  *     ConnectionServiceSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -98,8 +104,11 @@
  * <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
  * ConnectionServiceSettings connectionServiceSettings =
  *     ConnectionServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
  * ConnectionServiceClient connectionServiceClient =
@@ -110,8 +119,11 @@
  * 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
  * ConnectionServiceSettings connectionServiceSettings =
  *     ConnectionServiceSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -181,8 +193,11 @@ public ConnectionServiceStub 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
    *   ConnectionProto.Connection connection = ConnectionProto.Connection.newBuilder().build();
@@ -216,8 +231,11 @@ public final ConnectionProto.Connection createConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
    *   ConnectionProto.Connection connection = ConnectionProto.Connection.newBuilder().build();
@@ -251,8 +269,11 @@ public final ConnectionProto.Connection createConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.CreateConnectionRequest request =
    *       ConnectionProto.CreateConnectionRequest.newBuilder()
@@ -279,8 +300,11 @@ public final ConnectionProto.Connection createConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.CreateConnectionRequest request =
    *       ConnectionProto.CreateConnectionRequest.newBuilder()
@@ -307,8 +331,11 @@ public final ConnectionProto.Connection createConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionName name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   ConnectionProto.Connection response = connectionServiceClient.getConnection(name);
@@ -334,8 +361,11 @@ public final ConnectionProto.Connection getConnection(ConnectionName 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   ConnectionProto.Connection response = connectionServiceClient.getConnection(name);
@@ -359,8 +389,11 @@ public final ConnectionProto.Connection getConnection(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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.GetConnectionRequest request =
    *       ConnectionProto.GetConnectionRequest.newBuilder()
@@ -385,8 +418,11 @@ public final ConnectionProto.Connection getConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.GetConnectionRequest request =
    *       ConnectionProto.GetConnectionRequest.newBuilder()
@@ -411,8 +447,11 @@ public final ConnectionProto.Connection getConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
    *   UInt32Value maxResults = UInt32Value.newBuilder().build();
@@ -443,8 +482,11 @@ public final ConnectionProto.ListConnectionsResponse listConnections(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
    *   UInt32Value maxResults = UInt32Value.newBuilder().build();
@@ -475,8 +517,11 @@ public final ConnectionProto.ListConnectionsResponse listConnections(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.ListConnectionsRequest request =
    *       ConnectionProto.ListConnectionsRequest.newBuilder()
@@ -504,8 +549,11 @@ public final ConnectionProto.ListConnectionsResponse listConnections(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.ListConnectionsRequest request =
    *       ConnectionProto.ListConnectionsRequest.newBuilder()
@@ -534,8 +582,11 @@ public final ConnectionProto.ListConnectionsResponse listConnections(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionName name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   ConnectionProto.Connection connection = ConnectionProto.Connection.newBuilder().build();
@@ -570,8 +621,11 @@ public final ConnectionProto.Connection updateConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   ConnectionProto.Connection connection = ConnectionProto.Connection.newBuilder().build();
@@ -606,8 +660,11 @@ public final ConnectionProto.Connection updateConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.UpdateConnectionRequest request =
    *       ConnectionProto.UpdateConnectionRequest.newBuilder()
@@ -635,8 +692,11 @@ public final ConnectionProto.Connection updateConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.UpdateConnectionRequest request =
    *       ConnectionProto.UpdateConnectionRequest.newBuilder()
@@ -663,8 +723,11 @@ public final ConnectionProto.Connection updateConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String name = "name3373707";
    *   ConnectionProto.ConnectionCredential credential =
@@ -695,8 +758,11 @@ public final void updateConnectionCredential(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.UpdateConnectionCredentialRequest request =
    *       ConnectionProto.UpdateConnectionCredentialRequest.newBuilder()
@@ -722,8 +788,11 @@ public final void updateConnectionCredential(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.UpdateConnectionCredentialRequest request =
    *       ConnectionProto.UpdateConnectionCredentialRequest.newBuilder()
@@ -749,8 +818,11 @@ public final void updateConnectionCredential(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionName name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   connectionServiceClient.deleteConnection(name);
@@ -776,8 +848,11 @@ public final void deleteConnection(ConnectionName 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   connectionServiceClient.deleteConnection(name);
@@ -801,8 +876,11 @@ public final void deleteConnection(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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.DeleteConnectionRequest request =
    *       ConnectionProto.DeleteConnectionRequest.newBuilder()
@@ -826,8 +904,11 @@ public final void deleteConnection(ConnectionProto.DeleteConnectionRequest reque
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionProto.DeleteConnectionRequest request =
    *       ConnectionProto.DeleteConnectionRequest.newBuilder()
@@ -853,8 +934,11 @@ public final void deleteConnection(ConnectionProto.DeleteConnectionRequest reque
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ResourceName resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   GetPolicyOptions options = GetPolicyOptions.newBuilder().build();
@@ -884,8 +968,11 @@ public final Policy getIamPolicy(ResourceName resource, GetPolicyOptions options
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   GetPolicyOptions options = GetPolicyOptions.newBuilder().build();
@@ -912,8 +999,11 @@ public final Policy getIamPolicy(String resource, GetPolicyOptions options) {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   GetIamPolicyRequest request =
    *       GetIamPolicyRequest.newBuilder()
@@ -939,8 +1029,11 @@ public final Policy getIamPolicy(GetIamPolicyRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   GetIamPolicyRequest request =
    *       GetIamPolicyRequest.newBuilder()
@@ -966,8 +1059,11 @@ public final UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ResourceName resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   Policy policy = Policy.newBuilder().build();
@@ -1000,8 +1096,11 @@ public final Policy setIamPolicy(ResourceName resource, Policy policy) {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   Policy policy = Policy.newBuilder().build();
@@ -1031,8 +1130,11 @@ public final Policy setIamPolicy(String resource, Policy policy) {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   SetIamPolicyRequest request =
    *       SetIamPolicyRequest.newBuilder()
@@ -1060,8 +1162,11 @@ public final Policy setIamPolicy(SetIamPolicyRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   SetIamPolicyRequest request =
    *       SetIamPolicyRequest.newBuilder()
@@ -1091,8 +1196,11 @@ public final UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ResourceName resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   List<String> permissions = new ArrayList<>();
@@ -1130,8 +1238,11 @@ public final TestIamPermissionsResponse testIamPermissions(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   List<String> permissions = new ArrayList<>();
@@ -1169,8 +1280,11 @@ public final TestIamPermissionsResponse testIamPermissions(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   TestIamPermissionsRequest request =
    *       TestIamPermissionsRequest.newBuilder()
@@ -1200,8 +1314,11 @@ public final TestIamPermissionsResponse testIamPermissions(TestIamPermissionsReq
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   TestIamPermissionsRequest request =
    *       TestIamPermissionsRequest.newBuilder()
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceSettings.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceSettings.java
index af7bb3caf817..d87b6ea20ecf 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceSettings.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/ConnectionServiceSettings.java
@@ -57,8 +57,11 @@
  * <p>For example, to set the total timeout of createConnection 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
  * ConnectionServiceSettings.Builder connectionServiceSettingsBuilder =
  *     ConnectionServiceSettings.newBuilder();
  * connectionServiceSettingsBuilder
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/package-info.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/package-info.java
index 9e1d06b0aa90..271f2fe9adf4 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/package-info.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/package-info.java
@@ -24,8 +24,11 @@
  * <p>Sample for ConnectionServiceClient:
  *
  * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
  *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
  *   ConnectionProto.Connection connection = ConnectionProto.Connection.newBuilder().build();
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/ConnectionServiceStubSettings.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/ConnectionServiceStubSettings.java
index 5e035681c4f1..5e5749b8553c 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/ConnectionServiceStubSettings.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/ConnectionServiceStubSettings.java
@@ -69,8 +69,11 @@
  * <p>For example, to set the total timeout of createConnection 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
  * ConnectionServiceStubSettings.Builder connectionServiceSettingsBuilder =
  *     ConnectionServiceStubSettings.newBuilder();
  * connectionServiceSettingsBuilder
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/HttpJsonConnectionServiceStub.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/HttpJsonConnectionServiceStub.java
index 5acc486b16ca..a0b312c39747 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/HttpJsonConnectionServiceStub.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigquery/connection/v1beta1/stub/HttpJsonConnectionServiceStub.java
@@ -87,7 +87,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("connection", request.getConnection()))
+                                  .toBody("connection", request.getConnection(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<ConnectionProto.Connection>newBuilder()
@@ -203,7 +203,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("connection", request.getConnection()))
+                                  .toBody("connection", request.getConnection(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<ConnectionProto.Connection>newBuilder()
@@ -241,7 +241,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("credential", request.getCredential()))
+                                  .toBody("credential", request.getCredential(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Empty>newBuilder()
@@ -312,7 +312,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearResource().build()))
+                                  .toBody("*", request.toBuilder().clearResource().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Policy>newBuilder()
@@ -349,7 +349,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearResource().build()))
+                                  .toBody("*", request.toBuilder().clearResource().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Policy>newBuilder()
@@ -386,7 +386,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearResource().build()))
+                                  .toBody("*", request.toBuilder().clearResource().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<TestIamPermissionsResponse>newBuilder()
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceClient.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceClient.java
index ee225deb4d08..261399476d47 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceClient.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceClient.java
@@ -58,8 +58,11 @@
  * 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
  *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
  *   Connection connection = Connection.newBuilder().build();
@@ -99,8 +102,11 @@
  * <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
  * ConnectionServiceSettings connectionServiceSettings =
  *     ConnectionServiceSettings.newBuilder()
  *         .setCredentialsProvider(FixedCredentialsProvider.create(myCredentials))
@@ -112,8 +118,11 @@
  * <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
  * ConnectionServiceSettings connectionServiceSettings =
  *     ConnectionServiceSettings.newBuilder().setEndpoint(myEndpoint).build();
  * ConnectionServiceClient connectionServiceClient =
@@ -124,8 +133,11 @@
  * 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
  * ConnectionServiceSettings connectionServiceSettings =
  *     ConnectionServiceSettings.newBuilder()
  *         .setTransportChannelProvider(
@@ -194,8 +206,11 @@ public ConnectionServiceStub 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
    *   Connection connection = Connection.newBuilder().build();
@@ -229,8 +244,11 @@ public final Connection createConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
    *   Connection connection = Connection.newBuilder().build();
@@ -264,8 +282,11 @@ public final Connection createConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   CreateConnectionRequest request =
    *       CreateConnectionRequest.newBuilder()
@@ -291,8 +312,11 @@ public final Connection createConnection(CreateConnectionRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   CreateConnectionRequest request =
    *       CreateConnectionRequest.newBuilder()
@@ -318,8 +342,11 @@ public final UnaryCallable<CreateConnectionRequest, Connection> createConnection
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionName name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   Connection response = connectionServiceClient.getConnection(name);
@@ -343,8 +370,11 @@ public final Connection getConnection(ConnectionName 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   Connection response = connectionServiceClient.getConnection(name);
@@ -367,8 +397,11 @@ public final Connection getConnection(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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   GetConnectionRequest request =
    *       GetConnectionRequest.newBuilder()
@@ -392,8 +425,11 @@ public final Connection getConnection(GetConnectionRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   GetConnectionRequest request =
    *       GetConnectionRequest.newBuilder()
@@ -417,8 +453,11 @@ public final UnaryCallable<GetConnectionRequest, Connection> getConnectionCallab
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
    *   for (Connection element : connectionServiceClient.listConnections(parent).iterateAll()) {
@@ -446,8 +485,11 @@ public final ListConnectionsPagedResponse listConnections(LocationName 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String parent = LocationName.of("[PROJECT]", "[LOCATION]").toString();
    *   for (Connection element : connectionServiceClient.listConnections(parent).iterateAll()) {
@@ -472,8 +514,11 @@ public final ListConnectionsPagedResponse listConnections(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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ListConnectionsRequest request =
    *       ListConnectionsRequest.newBuilder()
@@ -501,8 +546,11 @@ public final ListConnectionsPagedResponse listConnections(ListConnectionsRequest
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ListConnectionsRequest request =
    *       ListConnectionsRequest.newBuilder()
@@ -531,8 +579,11 @@ public final ListConnectionsPagedResponse listConnections(ListConnectionsRequest
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ListConnectionsRequest request =
    *       ListConnectionsRequest.newBuilder()
@@ -569,8 +620,11 @@ public final ListConnectionsPagedResponse listConnections(ListConnectionsRequest
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionName name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   Connection connection = Connection.newBuilder().build();
@@ -604,8 +658,11 @@ public final Connection updateConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   Connection connection = Connection.newBuilder().build();
@@ -639,8 +696,11 @@ public final Connection updateConnection(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   UpdateConnectionRequest request =
    *       UpdateConnectionRequest.newBuilder()
@@ -667,8 +727,11 @@ public final Connection updateConnection(UpdateConnectionRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   UpdateConnectionRequest request =
    *       UpdateConnectionRequest.newBuilder()
@@ -694,8 +757,11 @@ public final UnaryCallable<UpdateConnectionRequest, Connection> updateConnection
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ConnectionName name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   connectionServiceClient.deleteConnection(name);
@@ -719,8 +785,11 @@ public final void deleteConnection(ConnectionName 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String name = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   connectionServiceClient.deleteConnection(name);
@@ -743,8 +812,11 @@ public final void deleteConnection(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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   DeleteConnectionRequest request =
    *       DeleteConnectionRequest.newBuilder()
@@ -768,8 +840,11 @@ public final void deleteConnection(DeleteConnectionRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   DeleteConnectionRequest request =
    *       DeleteConnectionRequest.newBuilder()
@@ -794,8 +869,11 @@ public final UnaryCallable<DeleteConnectionRequest, Empty> deleteConnectionCalla
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ResourceName resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   GetPolicyOptions options = GetPolicyOptions.newBuilder().build();
@@ -825,8 +903,11 @@ public final Policy getIamPolicy(ResourceName resource, GetPolicyOptions options
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   GetPolicyOptions options = GetPolicyOptions.newBuilder().build();
@@ -853,8 +934,11 @@ public final Policy getIamPolicy(String resource, GetPolicyOptions options) {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   GetIamPolicyRequest request =
    *       GetIamPolicyRequest.newBuilder()
@@ -880,8 +964,11 @@ public final Policy getIamPolicy(GetIamPolicyRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   GetIamPolicyRequest request =
    *       GetIamPolicyRequest.newBuilder()
@@ -907,8 +994,11 @@ public final UnaryCallable<GetIamPolicyRequest, Policy> getIamPolicyCallable() {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ResourceName resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   Policy policy = Policy.newBuilder().build();
@@ -941,8 +1031,11 @@ public final Policy setIamPolicy(ResourceName resource, Policy policy) {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   Policy policy = Policy.newBuilder().build();
@@ -972,8 +1065,11 @@ public final Policy setIamPolicy(String resource, Policy policy) {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   SetIamPolicyRequest request =
    *       SetIamPolicyRequest.newBuilder()
@@ -1001,8 +1097,11 @@ public final Policy setIamPolicy(SetIamPolicyRequest 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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   SetIamPolicyRequest request =
    *       SetIamPolicyRequest.newBuilder()
@@ -1032,8 +1131,11 @@ public final UnaryCallable<SetIamPolicyRequest, Policy> setIamPolicyCallable() {
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   ResourceName resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]");
    *   List<String> permissions = new ArrayList<>();
@@ -1071,8 +1173,11 @@ public final TestIamPermissionsResponse testIamPermissions(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   String resource = ConnectionName.of("[PROJECT]", "[LOCATION]", "[CONNECTION]").toString();
    *   List<String> permissions = new ArrayList<>();
@@ -1110,8 +1215,11 @@ public final TestIamPermissionsResponse testIamPermissions(
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   TestIamPermissionsRequest request =
    *       TestIamPermissionsRequest.newBuilder()
@@ -1141,8 +1249,11 @@ public final TestIamPermissionsResponse testIamPermissions(TestIamPermissionsReq
    * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
    *   TestIamPermissionsRequest request =
    *       TestIamPermissionsRequest.newBuilder()
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceSettings.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceSettings.java
index 16619b294f1e..1e1044fa4127 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceSettings.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/ConnectionServiceSettings.java
@@ -67,8 +67,11 @@
  * <p>For example, to set the total timeout of createConnection 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
  * ConnectionServiceSettings.Builder connectionServiceSettingsBuilder =
  *     ConnectionServiceSettings.newBuilder();
  * connectionServiceSettingsBuilder
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/package-info.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/package-info.java
index 7ef0548085d4..0e8c059c75f9 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/package-info.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/package-info.java
@@ -24,8 +24,11 @@
  * <p>Sample for ConnectionServiceClient:
  *
  * <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 (ConnectionServiceClient connectionServiceClient = ConnectionServiceClient.create()) {
  *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
  *   Connection connection = Connection.newBuilder().build();
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/ConnectionServiceStubSettings.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/ConnectionServiceStubSettings.java
index 2174b9e4b1e0..e8d1aca9ecd1 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/ConnectionServiceStubSettings.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/ConnectionServiceStubSettings.java
@@ -84,8 +84,11 @@
  * <p>For example, to set the total timeout of createConnection 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
  * ConnectionServiceStubSettings.Builder connectionServiceSettingsBuilder =
  *     ConnectionServiceStubSettings.newBuilder();
  * connectionServiceSettingsBuilder
diff --git a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/HttpJsonConnectionServiceStub.java b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/HttpJsonConnectionServiceStub.java
index 341d08f396ed..21a17ae2a849 100644
--- a/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/HttpJsonConnectionServiceStub.java
+++ b/java-bigqueryconnection/google-cloud-bigqueryconnection/src/main/java/com/google/cloud/bigqueryconnection/v1/stub/HttpJsonConnectionServiceStub.java
@@ -93,7 +93,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("connection", request.getConnection()))
+                                  .toBody("connection", request.getConnection(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Connection>newBuilder()
@@ -201,7 +201,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("connection", request.getConnection()))
+                                  .toBody("connection", request.getConnection(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Connection>newBuilder()
@@ -272,7 +272,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearResource().build()))
+                                  .toBody("*", request.toBuilder().clearResource().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Policy>newBuilder()
@@ -309,7 +309,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearResource().build()))
+                                  .toBody("*", request.toBuilder().clearResource().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<Policy>newBuilder()
@@ -346,7 +346,7 @@ public class HttpJsonConnectionServiceStub extends ConnectionServiceStub {
                       .setRequestBodyExtractor(
                           request ->
                               ProtoRestSerializer.create()
-                                  .toBody("*", request.toBuilder().clearResource().build()))
+                                  .toBody("*", request.toBuilder().clearResource().build(), false))
                       .build())
               .setResponseParser(
                   ProtoMessageResponseParser.<TestIamPermissionsResponse>newBuilder()