code: def _load_actor_from_local(self, driver_id, function_descriptor):
          
          module_name, class_name = (function_descriptor.module_name,
                                     function_descriptor.class_name)
          try:
              module = importlib.import_module(module_name)
              actor_class = getattr(module, class_name)
              if isinstance(actor_class, ray.actor.ActorClass):
                  return actor_class._modified_class
              else:
                  return actor_class
          except Exception:
              logger.exception(
                  "Failed to load actor_class %s.".format(class_name))
              raise Exception(
                  "Actor {} failed to be imported from local code.".format(
                      class_name))
docs: Load actor class from local code.