def METHOD_NAME(self):
    def int_or_str_int(checker, instance):
        if not isinstance(instance, (int, str)):
            return False
        try:
            int(instance)
        except ValueError:
            return False
        return True
    CustomValidator = extend(
        Draft202012Validator,
        type_checker=Draft202012Validator.TYPE_CHECKER.redefine(
            "integer", int_or_str_int,
        ),
    )
    validator = CustomValidator({"type": "integer"})
    validator.validate(4)
    validator.validate("4")
    with self.assertRaises(ValidationError):
        validator.validate(4.4)
    with self.assertRaises(ValidationError):
        validator.validate("foo")