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