public final OperationCallable<UpdateSourceRequest, Source, OperationMetadata>
      updateSourceOperationCallable() {
    return stub.updateSourceOperationCallable();
  }
Updates the parameters of a single Source.

<p>Sample code:

<pre>{@code
// 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 (VmMigrationClient vmMigrationClient = VmMigrationClient.create()) {
  UpdateSourceRequest request =
      UpdateSourceRequest.newBuilder()
          .setUpdateMask(FieldMask.newBuilder().build())
          .setSource(Source.newBuilder().build())
          .setRequestId("requestId693933066")
          .build();
  OperationFuture<Source, OperationMetadata> future =
      vmMigrationClient.updateSourceOperationCallable().futureCall(request);
  // Do something.
  Source response = future.get();
}
}</pre>
java-vmmigration/google-cloud-vmmigration/src/main/java/com/google/cloud/vmmigration/v1/VmMigrationClient.java