@Override
  protected ListenableFuture<String> buildChainingFuture(ListenableFuture<Integer> inputFuture) {
    outputFuture = SettableFuture.create();
    funcIsWaitingLatch = new CountDownLatch(1);
    funcCompletionLatch = new CountDownLatch(1);
    return transformAsync(inputFuture, new ChainingFunction(), directExecutor());
  }

  @Override
  protected String getSuccessfulResult() {

  @Override
  protected ListenableFuture<String> buildChainingFuture(ListenableFuture<Integer> inputFuture) {
    outputFuture = SettableFuture.create();
    funcIsWaitingLatch = new CountDownLatch(1);
    funcCompletionLatch = new CountDownLatch(1);
    return transformAsync(inputFuture, new ChainingFunction(), directExecutor());
  }

  @Override
  protected String getSuccessfulResult() {

      new UndeclaredThrowableException(EXCEPTION);

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

  @Override
  protected String getSuccessfulResult() {
    return RESULT_DATA;
  }

    @RetainedLocalRef ListenableFuture<? extends V> localInputFuture = delegateRef;
    @RetainedLocalRef ScheduledFuture<?> localTimer = timer;
    if (localInputFuture != null) {
      String message = "inputFuture=[" + localInputFuture + "]";
      if (localTimer != null) {
        long delay = localTimer.getDelay(MILLISECONDS);
        // Negative delays look confusing in an error message
        if (delay > 0) {