WeChat.Menu.try_match_menu

You're seeing just the function try_match_menu, go back to WeChat.Menu module for more information.
Link to this function

try_match_menu(client, user_id)

Specs

try_match_menu(WeChat.client(), user_id()) :: WeChat.response()

测试个性化菜单匹配结果 - 官方文档