Method is_classmethod

mypy/stubgenc.py:559–566

(self, class_info: ClassInfo, name: str, obj: object)

            return inspect.isfunction(obj)

    def is_classmethod(self, class_info: ClassInfo, name: str, obj: object) -> bool:
        if self.is_c_module:
            return inspect.isbuiltin(obj) or type(obj).__name__ in (
                "classmethod",
                "classmethod_descriptor",
            )
        else:
            return inspect.ismethod(obj)

    def is_staticmethod(self, class_info: ClassInfo | None, name: str, obj: object) -> bool:
        if class_info is None: