Add comment to config item before saving to disk. You can add as many
comment lines as you like. If you use a null format, all comments are
deleted.

def set_comment(self, format, *args):
        """
        Add comment to config item before saving to disk. You can add as many
comment lines as you like. If you use a null format, all comments are
deleted.
        """
        return lib.zconfig_set_comment(self._as_parameter_, format, *args)