code: def disable_aiohttp_cache():
      os.environ["RAY_DASHBOARD_NO_CACHE"] = "true"
      yield
      os.environ.pop("RAY_DASHBOARD_NO_CACHE", None)
  
file_path: ray/python/ray/dashboard/tests/conftest.py
imports: import os
  import pytest
  import pathlib
  from ray.tests.conftest import *
label_desc: Use image node_id 2 for calling a global function with example usage: disable_aiohttp_cache() without return types