subscribe(new ContributorPredicate(oplan.getUID()));
blackboard.subscribe(new ContributorPredicate(oplan.getUID()));
  private void processOplanAdds(Collection adds) {    for (Iterator it = adds.iterator(); it.hasNext();) {      Oplan oplan = (Oplan) it.next();            IncrementalSubscription is = (IncrementalSubscription) 	subscribe(new ContributorPredicate(oplan.getUID()));      contributors.add(is);    }  }