Type hinting a class decorator that returns a subclass

[BojieSheng]

Anyone knows who to annotate "cls" and return type for below function "examle_a"?

def example_a(cls):
    class A(cls):
        def __init__(self, x, y):
            self.x=x
            self.y=y
            super().__init__(x,y)

    return A

cls can be any class.