code: public static CommerceOrder fetchByUserId_First(long userId,
  		OrderByComparator<CommerceOrder> orderByComparator) {
  		return getPersistence().fetchByUserId_First(userId, orderByComparator);
  	}
docs: Returns the first commerce order in the ordered set where userId = &#63;.
  
  @param userId the user ID
  @param orderByComparator the comparator to order the set by (optionally <code>null</code>)
  @return the first matching commerce order, or <code>null</code> if a matching commerce order could not be found