code: def url(self):
          
          return "{server_url}/go/pipelines/{pipeline_name}/{pipeline_counter}/{stage_name}/{stage_counter}".format(
              server_url=self._session.server_url,
              pipeline_name=self.pipeline_name,
              pipeline_counter=self.pipeline_counter,
              stage_name=self.data.name,
              stage_counter=self.data.counter,
          )
docs: Returns url for accessing stage instance.