def ctrl_msg_parser(ops, cmd, info, arg):
raise NotImplementedError<EOL>
https://github.com/thom311/libnl/blob/libnl3_2_25/lib/genl/ctrl.c#L105.

    Positional arguments:
    ops -- nl_cache_ops class instance.
    cmd -- genl_cmd class instance.
    info -- genl_info class instance.
    arg -- nl_parser_param class instance, whose pp_cb attribute is called and passed itself.

    0 on success or a negative error code.