@Override
  public OperationCallable<DeleteMigratingVmRequest, Empty, OperationMetadata>
      deleteMigratingVmOperationCallable() {
    return deleteMigratingVmOperationCallable;
  }
Constructs an instance of GrpcVmMigrationStub, using the given settings. This is protected so
that it is easy to make a subclass, but otherwise, the static factory methods should be
preferred.
java-vmmigration/google-cloud-vmmigration/src/main/java/com/google/cloud/vmmigration/v1/stub/GrpcVmMigrationStub.java