ProcessPoolExecutor initializer 3.11 overloads return object?

The docs say:

initializer is an optional callable that is called at the start of each worker process;

No mention of it returning anything.

And type is Callable[..., None] as expected:

https://github.com/python/typeshed/blob/5eb040b1e60f5ec7833ea718abb0c24e48e04b7c/stdlib/concurrent/futures/process.pyi#L157-L159

But then for >=3.11 there's this overload:

https://github.com/python/typeshed/blob/5eb040b1e60f5ec7833ea718abb0c24e48e04b7c/stdlib/concurrent/futures/process.pyi#L173-L179

Seems to have come in on 8b3b6bf7cdbb8e5f3e842a8bfb1b654e73f10332.
@AlexWaygood am I missing something? 🤔

stdlib/concurrent/futures/process.pyi の ProcessPoolExecutor 宣言、特に 157-159 行と 173-179 行を読み、issue にリンクされている Python 3.11 のドキュメントと比較してください。overload の由来を確認するために commit 8b3b6bf7cdbb8e5f3e842a8bfb1b654e73f10332 を調べてください。stub がドキュメントに記載された initializer の動作を正確に表しているかどうかを解決できれば完了です。