docs: @Override
  	public CommerceDiscountRel fetchByCD_CN_First(long commerceDiscountId,
  		long classNameId,
  		OrderByComparator<CommerceDiscountRel> orderByComparator) {
  		List<CommerceDiscountRel> list = findByCD_CN(commerceDiscountId,
  				classNameId, 0, 1, orderByComparator);
  
  		if (!list.isEmpty()) {
  			return list.get(0);
  		}
  
  		return null;
  	}