Heads Up уведомление с использованием FireBase не отображается

Question

Я прочитал несколько постов по настройке уведомлений, и все уведомления идут в трей. Есть указатели? Вот мой код.

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Log.i("GCM MessagingService", "GCM Message :: " + remoteMessage.getData());
        String title = remoteMessage.getData().get("title");
        // Show Notification here...
        sendNotification(remoteMessage);
    }

    private void sendNotification(RemoteMessage remoteMessage) {

        RemoteMessage.Notification notification = remoteMessage.getNotification();
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, "default")
                .setLargeIcon(BitmapFactory.decodeResource(getResources(),R.drawable.applogo))
                .setSmallIcon(R.drawable.applogo)
                .setContentTitle(notification.getTitle())
                .setContentText(notification.getBody())
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent)
                .setPriority(NotificationCompat.PRIORITY_MAX)
                .setDefaults(NotificationCompat.DEFAULT_ALL);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        notificationManager.notify(0, notificationBuilder.build());

    }

}