AnimationFactory.getAmbulanceSpriteSheet();
AnimationFactory.getFireTruckSpriteSheet();
AnimationFactory.getPoliceCarSpriteSheet();
gc.getInput().addKeyListener(new WorldKeyListener(this));
gc.getInput().addMouseListener(new WorldMouseListener(this));
persistenceService = PersistenceServiceProvider.getPersistenceService();
trackingService = ContextTrackingProvider.getTrackingService();
registerMessageConsumers();