Bug 7235 [Contributions] Need dispose() for action delegates
bundles/org.eclipse.jface/src/org/eclipse/jface/action/MenuManager.java
*/
	private String menuText;
	/**
	 * Indicates whether <code>removeAll</code> should be
	 * called just before the menu is displayed.
	 */
	private boolean removeAllWhenShown = false;
	
	/**
	 * The parent contribution manager.
	 */
	private IContributionManager parent;
	/**
	 * Indicates this item is visible in its manager; <code>true</code> 
	 * by default.
	 */
	private boolean visible = true;
	/**
	 * The overrides for items of this manager
	 */
	private IContributionManagerOverrides overrides;
	
/**
 * Creates a menu manager.  The text and id are <code>null</code>.
 * Typically used for creating a context menu, where it doesn't need to be referred to by id.
 */
public MenuManager() {
	this(null, null);
}
/**