code: def groups_setPurpose(self, *, channel: str, purpose: str, **kwargs) -> SlackResponse:
          
          kwargs.update({"channel": channel, "purpose": purpose})
          return self.api_call("groups.setPurpose", json=kwargs)
docs: Sets the purpose for a private channel.
  
          Args:
              channel (str): The channel id. e.g. 'G1234567890'
              purpose (str): The new purpose for the channel. e.g. 'My Purpose'