def run_replay_worker(self, replay_id):
        """
            Launches a single replay server

        Args:
            replay_id: The id of the replay server
        """
        replay = self.replay_class(self.learner_config,
                                   self.env_config,
                                   self.session_config,
                                   index=replay_id)
        replay.start_threads()
        replay.join()

            Launches a single replay server

        Args:
            replay_id: The id of the replay server
        
surreal/launch/launcher.py