async def restrictChatMember(self, chat_id, user_id,
                                 until_date=None,
                                 can_send_messages=None,
                                 can_send_media_messages=None,
                                 can_send_other_messages=None,
                                 can_add_web_page_previews=None):
        """ See: https://core.telegram.org/bots/api#restrictchatmember """
        p = _strip(locals())
        return await self._api_request('restrictChatMember', _rectify(p))