如何在easyadmin菜单的网址中添加树枝链接？
easy_admin.yml：
design:
menu:
- ...
- { label: 'Language', icon: language, children: [{ label: FR, url: 'easy_admin/Language/fr.html.twig'}, { label: EN, url: 'easy_admin/Language/en.html.twig' }] } //Doesn't work
fr.html.twig：
{{ path('setlocale', {'language': 'fr'}) }}