class FairCallQueue extends AbstractQueue<E> implements BlockingQueue<E> {

  @Override
  public E peek() {
    E e = null;
    for (int i=0; e == null && i < queues.size(); i++) {
      e = queues.get(i).peek();
    }
    return e;
  }

  public  FairCallQueue(int priorityLevels, int capacity, String ns,
      Configuration conf);

}