docs: @BetaApi(
        "The surface for long-running operations is not stable yet and may change in the future.")
    public final OperationFuture<Empty, OperationMetadata> deleteInstanceAsync(InstanceName name) {
  
      DeleteInstanceRequest request =
          DeleteInstanceRequest.newBuilder().setName(name == null ? null : name.toString()).build();
      return deleteInstanceAsync(request);
    }