code: def testDetectsNewOldFiles(self):
      self._WriteToFile("b", "a")
      self._LoadAllEvents()
      self._WriteToFile("a", "a")
      self._LoadAllEvents()
      self.assertTrue(self._watcher.OutOfOrderWritesDetected())
  
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 15 for calling the DirectoryWatcherTest obj's underlying member method code with example usage: obj.testDetectsNewOldFiles() without return types