/**
* Inserts a separator at the specified position.
*
* @param index an integer specifying the position at which to insert the menu separator
* @exception IllegalArgumentException if the value of <code>index</code> < 0
*/
@Override
public void insertSeparator(int index) {
if (index < 0) {
throw new IllegalArgumentException("index less than zero.");
}
popupMenu.insertSeperator(index);
}
