class FSParentQueue extends FSQueue {

  @Override
  public List<FSQueue> getChildQueues() {
    readLock.lock();
    try {
      return ImmutableList.copyOf(childQueues);
    } finally {
      readLock.unlock();
    }
  }

  public  FSParentQueue(String name, FairScheduler scheduler,
      FSParentQueue parent);

}