private static final String RESULT_DATA = "SUCCESS";
  private static final UndeclaredThrowableException WRAPPED_EXCEPTION =
      new UndeclaredThrowableException(EXCEPTION);

  @Override
  protected ListenableFuture<String> buildChainingFuture(ListenableFuture<Integer> inputFuture) {
    return transform(inputFuture, new ComposeFunction(), directExecutor());
  }

  @Override