code: def _fetch_events_files_on_disk(self):
      all_files = tf.io.gfile.listdir(self._events_directory)
      relevant_files = [
          file_name for file_name in all_files
          if _DEBUGGER_EVENTS_FILE_NAME_REGEX.match(file_name)
      ]
      return sorted(relevant_files, key=self._obtain_file_index)