code: def set_event_loop(self, loop):
      if loop is not None:
          # we want to check if the loop is closed
          # in BaseTest.tearDown
          self.loop = loop
  
imports: import _thread
  import asyncio
  import contextvars
  import re
  import signal
  import sys
  import threading
  import unittest
  from test.test_asyncio import utils
  from unittest import mock
  from unittest.mock import patch
label_desc: Use image node_id 4 for calling the TestPolicy obj's underlying member method code with example usage: obj.set_event_loop(loop) without return types