code: async def unpin_chat_message(self, chat_id: typing.Union[base.Integer, base.String]) -> base.Boolean:
          
          payload = generate_payload(**locals())
  
          result = await self.request(api.Methods.UNPIN_CHAT_MESSAGE, payload)
          return result
docs: Use this method to unpin a message in a supergroup chat.
          The bot must be an administrator in the chat for this to work and must have the appropriate admin rights.
  
          Source: https://core.telegram.org/bots/api#unpinchatmessage
  
          :param chat_id: Unique identifier for the target chat or username of the target supergroup
          :type chat_id: :obj:`typing.Union[base.Integer, base.String]`
          :return: Returns True on success
          :rtype: :obj:`base.Boolean`