code: @Override
  	public CommerceAccountUserRel fetchByCommerceAccountUserId_First(
  		long commerceAccountUserId,
  		OrderByComparator<CommerceAccountUserRel> orderByComparator) {
  		List<CommerceAccountUserRel> list = findByCommerceAccountUserId(commerceAccountUserId,
  				0, 1, orderByComparator);
  
  		if (!list.isEmpty()) {
  			return list.get(0);
  		}
  
  		return null;
  	}
docs: Returns the first commerce account user rel in the ordered set where commerceAccountUserId = &#63;.
  
  @param commerceAccountUserId the commerce account user ID
  @param orderByComparator the comparator to order the set by (optionally <code>null</code>)
  @return the first matching commerce account user rel, or <code>null</code> if a matching commerce account user rel could not be found