private PlaceManager placeManager;
@Inject
public Header(MessageCenter messageCenter, ProductConfig productConfig, BootstrapContext bootstrap,
PlaceManager placeManager) {
this.messageBar = new MessageBar(messageCenter);
this.productConfig = productConfig;
this.bootstrap = bootstrap;
this.messageCenter = messageCenter;
this.placeManager = placeManager;
History.addValueChangeHandler(this);