Bug 7235 [Contributions] Need dispose() for action delegates
bundles/org.eclipse.jface/src/org/eclipse/jface/action/SubMenuManager.java
if (wrapper == null) {
		wrapper = wrapMenu(mgr);
		mapMenuToWrapper.put(mgr, wrapper);
	}
	return wrapper;
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public boolean isDynamic() {
	return parentMgr.isDynamic();
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public boolean isEnabled() {
	return isVisible() && parentMgr.isEnabled();
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public boolean isGroupMarker() {
	return parentMgr.isGroupMarker();
}
/* (non-Javadoc)
 * Method declared on IMenuManager.
 */
public boolean isSeparator() {
	return parentMgr.isSeparator();
}