def METHOD_NAME():
    @dataclass
    class Parent:
        a: str
        @field_validator('a')
        @classmethod
        def change_a(cls, v):
            return v + ' changed'
    @dataclass
    class Child(Parent):
        pass
    assert Parent(a='this is foobar good').a == 'this is foobar good changed'
    assert Child(a='this is foobar good').a == 'this is foobar good changed'