mySortOrderings.add(_sortOrdering);
  public void addSortOrdering(EOSortOrdering _sortOrdering, boolean _fireEvents) {    mySortOrderings.add(_sortOrdering);    if (_fireEvents) {      List oldSortOrderings = mySortOrderings;      mySortOrderings = new LinkedList(mySortOrderings);      mySortOrderings.add(_sortOrdering);      firePropertyChange(EOFetchSpecification.SORT_ORDERINGS, oldSortOrderings, mySortOrderings);    }    else {      mySortOrderings.add(_sortOrdering);    }  }