docs: @Override
  	public CommerceSubscriptionEntry fetchByG_U_Last(long groupId, long userId,
  		OrderByComparator<CommerceSubscriptionEntry> orderByComparator) {
  		int count = countByG_U(groupId, userId);
  
  		if (count == 0) {
  			return null;
  		}
  
  		List<CommerceSubscriptionEntry> list = findByG_U(groupId, userId,
  				count - 1, count, orderByComparator);
  
  		if (!list.isEmpty()) {
  			return list.get(0);
  		}
  
  		return null;
  	}