code: public boolean hasQueuedSubmissions() {
          WorkQueue[] ws; WorkQueue w;
          if ((ws = workQueues) != null) {
              for (int i = 0; i < ws.length; i += 2) {
                  if ((w = ws[i]) != null && !w.isEmpty())
                      return true;
              }
          }
          return false;
      }
docs: Returns {@code true} if there are any tasks submitted to this
  pool that have not yet begun executing.
  
  @return {@code true} if there are any queued submissions