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Assume I have a callable type with some arbitrary set of argument types:

Callable[[T1, T2, T3, <etc>, Tn], str]

Is there a way (presumably using TypeVarTuple or ParamSpec) to statically generate the following callable type from it?

Callable[[T1 | Iterable[T1], T2 | Iterable[T2], T3 | Iterable[T3], <etc>, Tn | Iterable[Tn]], str]
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