List newList = new LinkedList(oldValues);
List newList = new LinkedList(newValues);
    public void propertyChange(PropertyChangeEvent _event) {      Set oldValues = (Set) _event.getOldValue();      Set newValues = (Set) _event.getNewValue();      if (newValues != null && oldValues != null && newValues.size() > oldValues.size()) {        List newList = new LinkedList(oldValues);        newList.removeAll(oldValues);        EOModelEditor.this.setSelection(new StructuredSelection(newList));        EOModelEditor.this.setActivePage(EOModelEditor.EOENTITY_PAGE);      }    }