code: def closed(self) -> bool:
      return self.client_session.closed
  
imports: from typing import Any, Tuple, Optional, Type, Union
  import asyncio
  from types import TracebackType
  import orjson
  import aiohttp
  import aiohttp.abc
  import aiohttp.typedefs
  from .tls import internal_client_ssl_context, external_client_ssl_context
  from .config.deploy_config import get_deploy_config
label_desc: Use image node_id 11 for calling the ClientSession obj's underlying member method code with example usage: obj.closed() and returns: self