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