code: public void applyToDelegates (DelegateOp op)
      {
          if (_delegates != null) {
              for (int ii = 0, ll = _delegates.size(); ii < ll; ii++) {
                  PlaceManagerDelegate delegate = _delegates.get(ii);
                  if (op.shouldApply(delegate)) {
                      op.apply(delegate);
                  }
              }
          }
      }
docs: Applies the supplied operation to this manager's registered delegates.