code: def _shutdown():
      """called when the test finishes"""
      _async_util.close()
  
file_path: sqlalchemy/lib/sqlalchemy/testing/asyncio.py
imports: from __future__ import annotations
  from functools import wraps
  import inspect
  from .None import config
  from ..util.concurrency import _AsyncUtil
label_desc: Use image node_id 1 for calling a global function with example usage: _shutdown() without return types