question: public static void cancelNotificationsForRoomId ( String accountId , String roomId ) { Log . d ( LOG_TAG , "cancelNotificationsForRoomId " + accountId + " - " + roomId ) ; if ( null != mActiveEventStreamService ) { mActiveEventStreamService . cancelNotifications ( accountId , roomId ) ; } }
target:  Cancel the push notifications for a dedicated roomId. If the roomId is null, cancel all the push notification.