ListenableFuture<O> transformAsync(
          ListenableFuture<I> input,
          AsyncFunction<? super I, ? extends O> function,
          Executor executor) {
    return AbstractTransformFuture.createAsync(input, function, executor);
  }

  /**
   * Returns a new {@code Future} whose result is derived from the result of the given {@code

      ListenableFuture<O> transformAsync(
          ListenableFuture<I> input,
          AsyncFunction<? super I, ? extends O> function,
          Executor executor) {
    return AbstractTransformFuture.createAsync(input, function, executor);
  }

  /**
   * Returns a new {@code Future} whose result is derived from the result of the given {@code