docs: public void transferListeners(CoherentManagerEventQueue eventQueue)
      {
          synchronized (this.listeners)
          {
              synchronized (eventQueue.listeners)
              {
                  Iterator<FilteredManagerListenerWrapper> itr = eventQueue.listeners.iterator();
                  while (itr.hasNext())
                  {
                      FilteredManagerListenerWrapper listener = itr.next();
  
                      this.addListener(listener._listener);
                  }
                  eventQueue.listeners.clear();
              }
          }
      }