private function initMenu(Menu $menu) { $menu->add(new ActionMenuItem('Write Post', 'writePost')); $menu->add(new ActionMenuItem('All Posts', 'listPosts')); $menu->add((new MenuGroup('Authors'))->add(new ActionMenuItem('Register Author', MethodActionGenerator::actionId(Authors::class, 'register')))->add(new ActionMenuItem('All Authors', MethodActionGenerator::actionId(Authors::class, 'all')))); return $this; }