code: @Override
  	public CommerceDiscount fetchByG_C_Last(long groupId, String couponCode,
  		OrderByComparator<CommerceDiscount> orderByComparator) {
  		int count = countByG_C(groupId, couponCode);
  
  		if (count == 0) {
  			return null;
  		}
  
  		List<CommerceDiscount> list = findByG_C(groupId, couponCode, count - 1,
  				count, orderByComparator);
  
  		if (!list.isEmpty()) {
  			return list.get(0);
  		}
  
  		return null;
  	}
docs: Returns the last commerce discount in the ordered set where groupId = &#63; and couponCode = &#63;.
  
  @param groupId the group ID
  @param couponCode the coupon code
  @param orderByComparator the comparator to order the set by (optionally <code>null</code>)
  @return the last matching commerce discount, or <code>null</code> if a matching commerce discount could not be found