Method AddTask

cpp/src/arrow/util/async_util.cc:508–510

  std::size_t QueueSize() override { return throttle_->QueueSize(); }
  const util::tracing::Span& span() const override { return task_group_->span(); }
  bool AddTask(std::unique_ptr<Task> task) override {
    return task_group_->AddTask(std::move(task));
  }

 private:
  std::shared_ptr<ThrottledAsyncTaskScheduler> throttle_;