Bug 7235 [Contributions] Need dispose() for action delegates
bundles/org.eclipse.jface/src/org/eclipse/jface/action/SubMenuManager.java
*      parent manager.
 */
public SubMenuManager(IMenuManager mgr) {
	super(mgr);
	parentMgr = mgr;
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public void addMenuListener(IMenuListener listener) {
	parentMgr.addMenuListener(listener);
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public void fill(Composite parent) {
	if (isVisible())
		parentMgr.fill(parent);
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public void fill(Menu parent, int index) {
	if (isVisible())
		parentMgr.fill(parent, index);
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public void fill(ToolBar parent, int index) {