public function that($event, $aggregateIdentifier)
{
foreach ($this->listeners as $listener) {
if ($listener->listensTo($event)) {
$listener->on($event);
}
}
$this->store->append($event, $aggregateIdentifier);
}
private function appendEvents($events, $identifier)
{
foreach ($events as $event) {
$this->store->append($event, $identifier);
}
}