fragment of cocoa menu code

        let menubar = NSMenu::new(nil).autorelease();
        let app_menu_item = NSMenuItem::new(nil).autorelease();
        menubar.addItem_(app_menu_item);
        app.setMainMenu_(menubar);

        let app_menu = NSMenu::new(nil).autorelease();
        let quit_title = make_nsstring("Quit");
        let quit_action = selector("terminate:");
        let quit_key = make_nsstring("q");
        let quit_item = NSMenuItem::alloc(nil)
            .initWithTitle_action_keyEquivalent_(quit_title, quit_action, quit_key
)
            .autorelease();
        app_menu.addItem_(quit_item);
        app_menu_item.setSubmenu_(app_menu);