if (log.isTraceEnabled()) { log.trace(this + ": attempting to add receiver " + r); }
if (trace) { log.trace(this + ": attempting to add receiver " + r); }
   public boolean add(Receiver r)   {      if (log.isTraceEnabled()) { log.trace(this + ": attempting to add receiver " + r); }            boolean added = router.add(r);      if (log.isTraceEnabled()) { log.trace("receiver " + r + (added ? "" : " NOT") + " added"); }            return added;   }