/**
* @param XMLWriter $xmlWriter
* @param Invoice $invoice
*/
protected function addDiscount(XMLWriter $xmlWriter, Invoice $invoice)
{
if ($invoice->getDiscount() === null) {
return;
}
$xmlWriter->startElement('discount');
$xmlWriter->writeElement('percentage', $this->percentageFormatter->format($invoice->getDiscount()));
$xmlWriter->writeElement('amount', $this->currencyFormatter->formatCurrency($invoice->getDiscountAmount(), $invoice->getCurrencyCode()));
$xmlWriter->writeElement('after', $this->currencyFormatter->formatCurrency($invoice->getDiscountAmount(), $invoice->getCurrencyCode()));
$xmlWriter->endElement();
}