code: def start_raylet_monitor(self):
          
          stdout_file, stderr_file = self.new_log_files("raylet_monitor")
          process_info = ray.services.start_raylet_monitor(
              self._redis_address,
              stdout_file=stdout_file,
              stderr_file=stderr_file,
              redis_password=self._ray_params.redis_password,
              config=self._config)
          assert (ray_constants.PROCESS_TYPE_RAYLET_MONITOR not in
                  self.all_processes)
          self.all_processes[ray_constants.PROCESS_TYPE_RAYLET_MONITOR] = [
              process_info
          ]
docs: Start the raylet monitor.