/**
* Route this subscription to email providers based on rules configured for the store
*
* @param bool $asynchronous
* @return mixed An array of Interspire_EmailIntegration_AddSubscriberResult objects for synchronous calls, otherwise null
*/
public function routeSubscription($asynchronous = true)
{
$event = $this->getSubscriptionEventId();
if (!$event) {
// this subscription type does not support routing via subscription rules
return;
}
return ISC_EMAILINTEGRATION::routeSubscription($event, $this, $asynchronous);
}
