code: def _make_run_dir(self, _id):
      os.makedirs(self.basedir, exist_ok=True)
      self.dir = None
      if _id is None:
          fail_count = 0
          _id = self._maximum_existing_run_id() + 1
          while self.dir is None:
              try:
                  self._make_dir(_id)
              except FileExistsError:  # Catch race conditions
                  if fail_count < 1000:
                      fail_count += 1
                      _id += 1
                  else:  # expect that something else went wrong
                      raise
      else:
          self.dir = os.path.join(self.basedir, str(_id))
          os.mkdir(self.dir)
  
imports: import json
  import os
  import os.path
  from pathlib import Path
  from typing import Optional
  import warnings
  from shutil import copyfile, SameFileError
  from sacred.commandline_options import cli_option
  from sacred.dependencies import get_digest
  from sacred.observers.base import RunObserver
  from sacred import optional
  from sacred.serializer import flatten
  from sacred.utils import PathType
label_desc: Use image node_id 7 for calling the FileStorageObserver obj's underlying member method code with example usage: obj._make_run_dir(_id) without return types