public void createInvoiceService(A_InvoiceService I)
 {
     accounting.classes.Invoice inv= new accounting.classes.Invoice(I.invoiceId);
     inv.addService(I.serviceId, I.amount);
 }
 public void createInvoiceService(A_InvoiceService I)
 {
     accounting.classes.Invoice inv = new accounting.classes.Invoice(I.invoiceId);
     inv.addService(I.serviceId, I.amount);
 }