log = (LoggingService)getServiceBroker(). getService(this, LoggingService.class, null);
  protected void setupSubscriptions() {    UIDtable = new UniqueObjectSet();    bb = getBlackboardService();    pingReqSub = (IncrementalSubscription)bb.subscribe(pingReqPred);    pingSub = (IncrementalSubscription)bb.subscribe(pingPred);  }