MenuBar Component

How do I add an instance name to a Menu?

newsMenu = myMenuBar.addMenu(“News”);
multiMediaMenu = myMenuBar.addMenu(“Multimedia”);
multiMediaMenu.addMenuItem({label:“Music”, instanceName:“mnuMusic”});
multiMediaMenu.addMenuItem({label:“Video”, instanceName:“mnuVideo”});

so in the above code I want to an instance name to be attached to “News”. As above you can do it with menu items but can you do it with the actual menu?