public Invoice markInvoiceSuccessful(final String invoiceId) {
        return doPUT(Invoices.INVOICES_RESOURCE + "/" + invoiceId + "/mark_successful", null, Invoice.class);
    }
public Invoice markInvoiceSuccessful ( final String invoiceId ) { return doPUT ( Invoices . INVOICES_RESOURCE + "/" + invoiceId + "/mark_successful" , null , Invoice . class ) ; }
Mark an invoice as paid successfully - Recurly Enterprise Feature

@param invoiceId String Recurly Invoice ID