Bug 55592 [Contributions] SubActionBars does not properly handle menu listeners
bundles/org.eclipse.jface/src/org/eclipse/jface/action/SubContributionManager.java
*/
	protected void itemAdded(IContributionItem item, SubContributionItem wrap) {
		mapItemToWrapper.put(item, wrap);
	}
	/**
	 * Notifies that an item has been removed.
	 * <p>
	 * Subclasses are not expected to override this method.
	 * </p>
	 *
	 * @param item the item contributed by the client
	 */
	protected void itemRemoved(IContributionItem item) {
		mapItemToWrapper.remove(item);
	}
	/**
	  * @deprecated Use getItems(String value) instead.
	 */
	public Enumeration items() {
		final Iterator i = mapItemToWrapper.values().iterator();
		return new Enumeration() {
			public boolean hasMoreElements() {
				return i.hasNext();
			}
			public Object nextElement() {
				return i.next();
			}
		};
	}
	/* (non-Javadoc)