[Feature Request] ---@final to mark class method as non-overridable

In languages like Java, you have the keyword final to indicate that a function should NOT be overridden. There doesn't seem to be any annotation like that yet. It should give a warning (or error?) if you try to override the function. Additionally, completion for function MyClass: could avoid suggesting anything with @final? You'd still be able to call it anywhere, just not override it if its now final.

(Maybe @final could also work on variables? Pretty much working the same way, just "don't override/set this but still be able to read it")

(Unrelated but I was thinking about ---@override to mark something as "you should override this and not call this" but it wouldn't be able to warn since your internal code needs to call it, so I'm not sure. Might just be good to have anyway, not as a warning but a tooltip thing.)

ソースファイル、テスト、エントリポイントのいずれも指定されていません。まず、@final がメソッド、変数、またはその両方に適用されるのか、また違反によって警告またはエラーが生成されるのかを明確にしてから、言語サーバーのアノテーション、オーバーライドチェック、補完の挙動を調査してください。選択したセマンティクスが一貫して実装され、診断または補完のテストでカバーされていれば完了です。