private boolean notExistBestPrice(ProductInEshopEntity entity) {
   return entity.getBestPrice() == null;
 }
 private boolean isBestPriceGreaterThanActualPriceForPackage(
     ProductInEshopInfoUpdateDto priceUpdateDto, ProductInEshopEntity entity) {
   return entity.getBestPrice().compareTo(priceUpdateDto.getPriceForPackage()) > 0;
 }