code: def create_and_test_config_to_json_file(self):
      config_first = self.config_class(**self.inputs_dict)
  
      with tempfile.TemporaryDirectory() as tmpdirname:
          json_file_path = os.path.join(tmpdirname, "config.json")
          config_first.to_json_file(json_file_path)
          config_second = self.config_class.from_json_file(
              json_file_path
          )
  
      self.parent.assertEqual(
          config_second.to_dict(), config_first.to_dict()
      )
  
imports: import copy
  import json
  import os
  import shutil
  import sys
  import tempfile
  import unittest
  import unittest.mock
  from pathlib import Path
  from huggingface_hub import HfFolder, delete_repo, set_access_token
  from requests.exceptions import HTTPError
  from transformers import AutoConfig, BertConfig, GPT2Config, is_torch_available
  from transformers.configuration_utils import PretrainedConfig
  from transformers.testing_utils import TOKEN, USER, is_staging_test
  from test_module.custom_configuration import CustomConfig
label_desc: Use image node_id 4 for calling the ConfigTester obj's underlying member method code with example usage: obj.create_and_test_config_to_json_file() without return types