private void notifyLoaded(final ArrivalTimes arrivalsForLine) {
   interactorHandler.postResponse(
       new Runnable() {
         @Override
         public void run() {
           callback.onLoaded(arrivalsForLine);
         }
       });
 }
 private void notifyError(final SevibusException error) {
   interactorHandler.postResponse(
       new Runnable() {
         @Override
         public void run() {
           errorCallback.onError(error);
         }
       });
 }
 private void notifyCompleted() {
   interactorHandler.postResponse(
       new Runnable() {
         @Override
         public void run() {
           completeCallback.onCompleted();
         }
       });
 }