Improve sync_wrapper's definition so that we get better typing #2178
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Because otherwise the type will enforce that the caller checks which variant it is, which is too verbose. Ultimately this probably means that we shouldn't overload methods like this, but instead should have a separate interface for the non-async case where all methods are explicitly non-async, so that we can remove those annotations from the async ones and then the typer can help us to not forget "await".
This would prevent from calling them with e.g. `str | None` with the previous changes.
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Before, calling functions such as
self.get_stateorself.turn_onwith anything else but the required type (in these two cases, str) would not lead to a type error, but rather to a runtime error long down the chain.This now properly fails to typecheck.