code: def dict_to_serialized_dict(ref, the_dict):
      
      result = {}
      for elt in list(the_dict.values()):
          if not getattr(elt, 'serialize', None):
              continue
          result[elt.uuid] = elt.serialize()
      return result
docs: Serialize the list of elements to a dictionary
  
      Used for the retention store
  
      :param ref: Not used
      :type ref:
      :param the_dict: dictionary to convert
      :type the_dict: dict
      :return: dict of serialized
      :rtype: dict