class_docstr: config unit test
docstr: save config unittest 
docstr_tok: ["save","config","unittest"]
code: def test_save_config(self):
      """save config unittest"""
      utils.save_config(self.conf_true, self.conf_file)
      conf = utils.load_config(self.conf_file)
      self.assertDictEqual(conf, self.conf_true)
  
file_path: delta/delta/utils/config_test.py
imports: import tempfile
  from absl import logging
  import os
  import delta.compat
  from delta import utils
  from delta import PACKAGE_ROOT_DIR
label_desc: Use image node_id 4 for calling the ConfigTest obj's underlying member method code with example usage: obj.test_save_config() without return types