code: def new_custom_log_dir(self, session_id: str):
      custom_log_dir = self._get_custom_log_dir(
          self._custom_log_dir, session_id
      )
      if custom_log_dir:
          os.makedirs(custom_log_dir, exist_ok=True)
          return custom_log_dir
  
file_path: mars/mars/services/session/worker/custom_log.py
imports: import os
  import shutil
  import tempfile
  from typing import Any, Dict, List
  from ....None import oscar
  from ....lib.aio import AioFileObject
label_desc: Use image node_id 3 for calling the CustomLogActor obj's underlying member method code with example usage: obj.new_custom_log_dir(session_id) and returns: custom_log_dir