ENUM
Methods to use when ordering DeliveryNoteItem.
DeliveryNoteItem
enum DeliveryNoteItemsOrderBy {NATURALDOCUMENT_ID_ASCDOCUMENT_ID_DESCPOS_NR_ASCPOS_NR_DESCQUANTITY_ASCQUANTITY_DESCPRODUCT_NR_ASCPRODUCT_NR_DESCEAN_NR_ASCEAN_NR_DESCGTIN_NR_ASCGTIN_NR_DESCDESCRIPTION_ASCDESCRIPTION_DESC}