Collection coupons = query(new CouponPredicate(oplan.getUID()));
Collection coupons = blackboard.query(new CouponPredicate(oplan.getUID()));
  private void processOplanDeletes(Collection deletes) {    for (Iterator it = deletes.iterator(); it.hasNext();) {      Oplan oplan = (Oplan) it.next();      Collection coupons = query(new CouponPredicate(oplan.getUID()));      for (Iterator couponIt = coupons.iterator(); couponIt.hasNext();) {	publishRemove(couponIt.next());      }    }  }