public static function getSubscribedEvents()
{
return ['db.metadata.load' => ['loadFromCache' => 10, 'storeInCache' => -10], 'db.metadata.delete' => ['deleteFromCache' => -10], 'db.image.delete' => ['deleteFromCache' => -10], 'db.metadata.update' => ['storeInCache' => -10]];
}