class_docstr: Base class for writers that obtain events from :class:`EventStorage` and process them.
code: def close(self):
      pass
  
imports: import datetime
  import json
  import logging
  import os
  import time
  from collections import defaultdict
  from contextlib import contextmanager
  from functools import cached_property
  from typing import Optional
  import torch
  from fvcore.common.history_buffer import HistoryBuffer
  from detectron2.utils.file_io import PathManager
label_desc: Use image node_id 2 for calling the EventWriter obj's underlying member method code with example usage: obj.close() without return types