docs: @LifecycleStop
    public void stop()
    {
      giant.lock();
  
      try {
        tasks.clear();
        taskFutures.clear();
        active = false;
        managerExec.shutdownNow();
        storageSyncExec.shutdownNow();
        managementMayBeNecessary.signalAll();
      }
      finally {
        giant.unlock();
      }
    }