code: def to_serializable_value(self):
          
          return_dict = {}
          for name, field in self.__dict__.items():
              if isinstance(field, fields.Field):
                  return_dict[name] = field.to_serializable_value()
          return return_dict
docs: Parses the Hightonmodel to a serializable value such dicts, lists, strings
          This can be used to save the model in a NoSQL database
  
          :return: the serialized HightonModel
          :rtype: dict