*/
    void addItemListener(ItemListener l);

    /**
     * Removes an <code>ItemListener</code> from the model.
     *
     * @param l the listener to remove
     */
    void removeItemListener(ItemListener l);

    /**
     * Adds a <code>ChangeListener</code> to the model.
     *
     * @param l the listener to add
     */
    void addChangeListener(ChangeListener l);

    /**
     * Removes a <code>ChangeListener</code> from the model.
     *
     * @param l the listener to remove
     */
    void removeChangeListener(ChangeListener l);

}