/**
  * Returns the priority of the internal listen thread.
  *
  * @return a value between {@link Thread#MIN_PRIORITY} and {@link Thread#MAX_PRIORITY}.
  * @since 1.2.2
  */
 public int getPriority() {
   ServerThread st = server;
   if (st != null) {
     return st.getPriority();
   } else {
     return Thread.NORM_PRIORITY;
   }
 }