fromfastcore.basicsimportpatch,patch_toclassKeywordArgumentsMixin:    ...# NOTE: this works if uncommented# @classmethod# def get_class_keywords(cls:KeywordArgumentsMixin) -> list:#     return inspect.getfullargspec(cls.__init__).kwonlyargs

@dataclassclassFoo(KeywordArgumentsMixin):_:KW_ONLYa:int=1b:int=2c:int=3@dataclassclassQux(KeywordArgumentsMixin):_:KW_ONLYq:str=-2u:str=-1x:int=0#| export@dataclassclassBar(Foo):_:KW_ONLYx:int=7y:int=8z:int=9@dataclassclassBaz(Bar,Qux):_:KW_ONLYa:int=6b:int=7q:int=0

@patch(cls_method=True)def get_class_keywords(cls:KeywordArgumentsMixin) -> list:     return inspect.getfullargspec(cls.__init__).kwonlyargs

list(c.get_class_keywords()forcin (Foo,Qux,Bar,Baz))> [[], [], [], []]