def METHOD_NAME(cls, *args, **kwargs):
    if cls._args_schema is not None:
        return cls._args_schema
    cls._args_schema = super().METHOD_NAME(*args, **kwargs)
    # define Arg Group ""
    _args_schema = cls._args_schema
    _args_schema.filter = AAZStrArg(
        options=["--filter"],
        help="Specify $filter='location eq <location>' to filter on location.",
    )
    return cls._args_schema