Android 4.3+ NotificationListenerService

Hi! Recently I came across the new class NotificationListenerService.
I'm trying to make an app that reads the notifications as posted and silence them (according to some parameters).
I am able to read them, and categorize them but unable to silence them.
I have tried to silence the whole system when receiving a notification and un-silencing it some seconds after, but thats not good (it worked, but its not a good solution).
Is there a way to silence a specific notification?
I receive them in [HIGH]public void onNotificationPosted(StatusBarNotification sbn){}[/HIGH] as a StatusBarNotification.Thanks!