public function addAdminMenuItem(MenuCollectionEvent $event): void
    {
        if (!$this->auth->isGranted('ROLE_ADMIN')) {
            return;
        }

        $menu = $event->getMenu();

        // Create admin menu item.
        $admin = $this->factory->createItem('menu_item.admin', [
            'route' => 'bkstg_admin_redirect',
            'extras' => [
                'icon' => 'wrench',
                'translation_domain' => BkstgCoreBundle::TRANSLATION_DOMAIN,
            ],
        ]);
        $menu->addChild($admin);
    }