code: @Beta
    public static <O> ListenableFuture<O> submitAsync(AsyncCallable<O> callable, Executor executor) {
      TrustedListenableFutureTask<O> task = TrustedListenableFutureTask.create(callable);
      executor.execute(task);
      return task;
    }
docs: Executes {@code callable} on the specified {@code executor}, returning a {@code Future}.
  
  @throws RejectedExecutionException if the task cannot be scheduled for execution
  @since 23.0