/**
* Get payment extension attributes
* @param InfoInterface $payment
* @return OrderPaymentExtensionInterface
*/
private function getExtensionAttributes(InfoInterface $payment)
{
$extensionAttributes = $payment->getExtensionAttributes();
if (null === $extensionAttributes) {
$extensionAttributes = $this->paymentExtensionFactory->create();
$payment->setExtensionAttributes($extensionAttributes);
}
return $extensionAttributes;
}