ENUM
Methods to use when ordering InvoiceItem.
InvoiceItem
enum InvoiceItemsOrderBy {NATURALID_ASCID_DESCDOCUMENT_ID_ASCDOCUMENT_ID_DESCPOS_NR_ASCPOS_NR_DESCDESCRIPTION_ASCDESCRIPTION_DESCPRODUCT_NR_ASCPRODUCT_NR_DESCEAN_NR_ASCEAN_NR_DESCGTIN_NR_ASCGTIN_NR_DESCQUANTITY_ASCQUANTITY_DESCUNIT_NET_PRICE_ASCUNIT_NET_PRICE_DESCDISCOUNT_PERCENT_ASCDISCOUNT_PERCENT_DESCVAT_PERCENT_ASCVAT_PERCENT_DESCUPDATED_AT_ASCUPDATED_AT_DESCCREATED_AT_ASCCREATED_AT_DESC}