code: @Override
  	public void onUnregistered(Context context) {
  		if(notificationCallback != null) {
  			notificationCallback.onUnregister(context);
  			
  			if(logger != null && logger.isDebugEnabled()) {
  				logger.debug("SocializeC2DMReceiver successfully unregistered");
  			}
  		}
  		else {
  			logWarn("No notificationCallback found in GCM receiver.  Initialization may have failed.");
  		}	
  	}
docs: /* (non-Javadoc)
  @see com.socialize.notifications.C2DMReceiverHandler#onUnregistered(android.content.Context)