frame = frame.parent;
他很郁闷：“那我们怎么办？转型也来不及啊。”。业内人士推荐立即前往 WhatsApp 網頁版作为进阶阅读
，更多细节参见手游
(For a primary source, here's a video of Sussman answering the same question at a different event, starting at 59:35.)
fn lookup_user(users: [User], name: string) - ?User {，推荐阅读免实名服务器获取更多信息