code: def stop(self):
      if self._threaded:
          asyncio.run_coroutine_threadsafe(
              self._stop(), self.loop
          ).result()
          self._thread.join()
  
file_path: mars/mars/lib/aio/isolation.py
imports: import asyncio
  import atexit
  import threading
  from typing import Dict, Optional
label_desc: Use image node_id 5 for calling the Isolation obj's underlying member method code with example usage: obj.stop() without return types