public IEnumerable <OrderLineDTO> GetDetailsLines(string orderNumber, string deliveryNoteNumber, string orderType, string receiptLetter)
 {
     return((receiptLetter != "B")
                 ? _linesService.GetLines(orderNumber, deliveryNoteNumber, orderType)
                 : _linesService.GetLinesForInvoicesTypeB(orderNumber, deliveryNoteNumber, orderType));
 }