code: def leave_group(self, group_id, timeout=None):
          
          self._post(
              '/v2/bot/group/{group_id}/leave'.format(group_id=group_id),
              timeout=timeout
          )
docs: Call leave group API.
  
          https://devdocs.line.me/en/#leave
  
          Leave a group.
  
          :param str group_id: Group ID
          :param timeout: (optional) How long to wait for the server
              to send data before giving up, as a float,
              or a (connect timeout, read timeout) float tuple.
              Default is self.http_client.timeout
          :type timeout: float | tuple(float, float)