Bug 55592 [Contributions] SubActionBars does not properly handle menu listeners
bundles/org.eclipse.jface/src/org/eclipse/jface/action/SubMenuManager.java
if (item instanceof IMenuManager) {
			
			IMenuManager menu = (IMenuManager) item;
			item = getWrapper(menu);
		}
		return item;
	}
	/**
	 * <p>
	 * The menu returned is wrapped within a <code>SubMenuManager</code> to
	 * monitor additions and removals.  If the visibility of this menu is modified
	 * the visibility of the submenus is also modified.
	 * </p>
	 */
	public IMenuManager findMenuUsingPath(String path) {
		IContributionItem item = findUsingPath(path);
		if (item instanceof IMenuManager) {
			return (IMenuManager) item;
		}
		return null;
	}
	/* (non-Javadoc)
	 * Method declared on IMenuManager.
	 *
	 * Returns the item passed to us, not the wrapper.
	 *
	 * We use use the same algorithm as MenuManager.findUsingPath, but unwrap
	 * submenus along so that SubMenuManagers are visible.
	 */
	public IContributionItem findUsingPath(String path) {