code: def setUp(self):
      # Put everything in a directory so it's easier to delete.
      self._directory = os.path.join(self.get_temp_dir(), "monitor_dir")
      os.mkdir(self._directory)
      self._watcher = directory_watcher.DirectoryWatcher(
          self._directory, _ByteLoader
      )
      self.stubs = tf.compat.v1.test.StubOutForTesting()
  
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 1 for calling the DirectoryWatcherTest obj's underlying member method code with example usage: obj.setUp() without return types