docs: public boolean isQueueEmpty()
     {
        if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.entry(this, tc, "isQueueEmpty");
        boolean isEmpty;
        synchronized(queue)
        {
      	  isEmpty = queue.isEmpty();
        }
        if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.exit(this, tc, "isQueueEmpty", isEmpty);
        return isEmpty;
     }