class JsWorkbenchScreenActivity extends AbstractWorkbenchScreenActivity implements JsWorkbenchLazyActivity {

    Void registerSubscription(final Object callback, final String eventFqcn, final Object obj) {
        subscriptions.add(getSubscription(callback, eventFqcn));
        subscribeOnErraiBus(eventFqcn);
        return null;
    }

    public  JsWorkbenchScreenActivity(final JsNativeScreen screen,
                                     final PlaceManager placeManager);

}