if (log.isTraceEnabled()) { log.trace(this + (removed ? " removed " : " did NOT remove ") + receiver); }
if (trace) { log.trace(this + (removed ? " removed " : " did NOT remove ") + receiver); }
   public boolean remove(Receiver receiver)   {      boolean removed = router.remove(receiver);      if (log.isTraceEnabled()) { log.trace(this + (removed ? " removed " : " did NOT remove ") + receiver); }      return removed;   }