public void addElement(Object obj) {
      String newItem = ((String)obj).trim();

      if (newItem.isEmpty()) {
        return;
      }

      if (!contains(newItem)) {
        // set newly added item as selected.
        // otherwise current selection will be set to editor
        mySelectedItem = newItem;
        insertElementAt(newItem, 0);
      }
    }
public void addElement(Object obj)