code: def _set_result(self, out: _Error | _OK[_T]) -> None:
      self._out = out
      self._event.set()
  
imports: from __future__ import annotations
  import abc
  import functools
  import threading
  from collections.abc import Awaitable, Generator
  from dataclasses import dataclass
  from datetime import timedelta
  from typing import Generic, Literal, NoReturn, TypeVar
  from tornado.ioloop import IOLoop
  from distributed.client import Future
  from distributed.protocol import to_serialize
  from distributed.utils import LateLoopEvent, iscoroutinefunction, sync, thread_state
  from distributed.utils_comm import WrappedKey
  from distributed.worker import get_client, get_worker
label_desc: Use image node_id 4 for calling the ActorFuture obj's underlying member method code with example usage: obj._set_result(out) without return types