code: def tearDown(self):
      self.stubs.CleanUp()
      try:
          shutil.rmtree(self._directory)
      except OSError:
          # Some tests delete the directory.
          pass
  
imports: import os
  import shutil
  import tensorflow
  from tensorboard.backend.event_processing import directory_watcher
  from tensorboard.backend.event_processing import io_wrapper
label_desc: Use image node_id 2 for calling the DirectoryWatcherTest obj's underlying member method code with example usage: obj.tearDown() without return types