merge method

Implementation

@override
FastResponseAd merge(covariant FastResponseAd model) {
  return copyWith(
    language: model.language,
    title: model.title,
    description: model.description,
    image: model.image,
    url: model.url,
    ranking: model.ranking,
    video: model.video,
    merchant: model.merchant,
    discount: model.discount,
    button: model.button,
    price: model.price,
  );
}