code: def mpim_close(self, *, channel: str, **kwargs) -> SlackResponse:
          
          kwargs.update({"channel": channel})
          return self.api_call("mpim.close", json=kwargs)
docs: Closes a multiparty direct message channel.
  
          Args:
              channel (str): Multiparty Direct message channel to close. e.g. 'G1234567890'