How to typecheck a decorator that does not return a function in a class body?

[rhelmot]

from typing import Callable, reveal_type

def wrapper(f: Callable[[int], str]) -> str:
    return f(4)

class A:
    @wrapper
    def foo(x: int):
        return 'A'*x

reveal_type(A.foo)
print(A.foo)

a = A()
reveal_type(a.foo)
print(a.foo)

This code works, but pyright thinks the x: int annotation is conflicting with it being typed as Self@A: error: Type of parameter "x" must be a supertype of its class "A". Clearly I'm missing something to communicate to the type checker that this body shouldn't be interpreted as an instance method. I can write @staticmethod and that works but I would really like to find some solution that just adjusts the signature and body of wrapper since this is gonna be a LOT of lines in the code I'm trying to write.