code: def tearDown(self):
      # just in case if we have transport close callbacks
      if not self.loop.is_closed():
          test_utils.run_briefly(self.loop)
  
      self.doCleanups()
      support.gc_collect()
      super().tearDown()
  
imports: import asyncio
  import errno
  import os
  import socket
  import sys
  import tempfile
  import unittest
  from asyncio import base_events
  from asyncio import constants
  from unittest import mock
  from test import support
  from test.support import os_helper
  from test.support import socket_helper
  from test.test_asyncio import utils
label_desc: Use image node_id 5 for calling the SendfileBase obj's underlying member method code with example usage: obj.tearDown() without return types