docs: def record_deployed_values(deployed_values, filename):
      # type: (Dict[str, Any], str) -> None
      """Record deployed values to a JSON file.
  
      This allows subsequent deploys to lookup previously deployed values.
  
      """
      final_values = {}  # type: Dict[str, Any]
      if os.path.isfile(filename):
          with open(filename, 'r') as f:
              final_values = json.load(f)
      final_values.update(deployed_values)
      with open(filename, 'wb') as f:
          data = serialize_to_json(final_values)
          f.write(data.encode('utf-8'))