exposing to_data_model bug

def test_get_default_pool(self):
        pool_dict = {'protocol': constants.PROTOCOL_HTTP, 'name': 'pool1',
                'description': 'desc1',
                'lb_algorithm': constants.LB_ALGORITHM_ROUND_ROBIN,
                'enabled': True, 'operating_status': constants.ONLINE}
        listener = self.listener_repo.create(
            self.session, protocol=constants.PROTOCOL_HTTP, protocol_port=80,
            enabled=True, provisioning_status=constants.ACTIVE,
            operating_status=constants.ONLINE)

        repos = repo.Repositories()
        pool = repos.create_pool_on_listener(self.session, listener.id,
                                                     pool_dict)

        new_pool = self.pool_repo.get(self.session, id=pool.id)
        self.assertIsInstance(new_pool, models.Pool)
        self.assertIsNotNone(new_pool.listener.default_pool)
        self.assertIsInstance(new_pool.listener.default_pool, models.Pool)