def serialize(self, items):
        raise NotImplementedError("serialize(..) not implemented")
Creates a Sitelink Feed Item.
dataset/ETHPy150Open bw2/ConfigArgParse/configargparse.py/ConfigFileParser.serialize--crossover with--dataset/ETHPy150Open googleads/googleads-python-lib/examples/adwords/v201603/migration/migrate_to_extension_settings.py/CreateSitelinkFeedItem