Line :: loid - Instace identifier for attached line
The function returns the database instance identifier (LOID) for the line. In order to re-attach the line to the item later on, the LOID is the most save way of setting a sort of bookmark. List items can be re-attached by LOID also when the list has changed meanwhile.
When no list item is attached to the line, the function throws an exception.
Return value: Instance identifier ( int64 )
Local object instance identifier (LOID) are numbers, which uniquely identify an object instance in the database.