docs issue at: 入门示例-菜单

[canpiaygame]

引擎版本3.8.2，按照官网插件教程，修改插件代码后，点击菜单栏新出现的插件按钮，

报错代码如下：
Error: Method does not exist(simple-1649426645745.log)
at Package.execWithoutReply (E:\Cocos\ProgramData\cocoseditors\Creator\3.8.2\resources\app.asar\node_modules@editor\package\dist\browser\package.ccc:1:4449)
at E:\Cocos\ProgramData\cocoseditors\Creator\3.8.2\resources\app.asar\node_modules@editor\package\dist\browser\index.js:1:3404
at E:\Cocos\ProgramData\cocoseditors\Creator\3.8.2\resources\app.asar\node_modules@base\electron-base-ipc\dist\sender.ccc:1:1789
at Array.forEach ()
at EventSender.immediately (E:\Cocos\ProgramData\cocoseditors\Creator\3.8.2\resources\app.asar\node_modules@base\electron-base-ipc\dist\sender.ccc:1:1777)
at Immediate. (E:\Cocos\ProgramData\cocoseditors\Creator\3.8.2\resources\app.asar\node_modules@base\electron-base-ipc\dist\sender.ccc:1:1578)
at processImmediate (internal/timers.js:461:21)