def get_builtin_type(self, model):
        """Return built-in type representation of Collection.

        :param DomainModel model:
        :rtype list:
        """
        return [item.get_data() if isinstance(item, self.related_model_cls)
                else item for item in self.get_value(model)]
Return built-in type representation of Collection.

        :param DomainModel model:
        :rtype list: