code: def groups_replies(self, *, channel: str, thread_ts: str, **kwargs) -> SlackResponse:
          
          self._validate_xoxp_token()
          kwargs.update({"channel": channel, "thread_ts": thread_ts})
          return self.api_call("groups.replies", http_verb="GET", params=kwargs)
docs: Retrieve a thread of messages posted to a private channel
  
          Args:
              channel (str): The channel id. e.g. 'C1234567890'
              thread_ts (str): The timestamp of an existing message with 0 or more replies.
                  e.g. '1234567890.123456'