2");
  nodeA->addItem("Child 3");
  nodeA->addItem("Child 4");
  nodeB->addItem("Child 5");
  nodeB->addItem("Child 6");
  nodeB->addItem("Child 7");

  // Create the observer widget, set its context and then initialize it
  ObserverWidget* observer_widget = new ObserverWidget();
  QtilitiesApplication::setMainWindow(observer_widget);
  observer_widget->setObserverContext(rootNode);
  observer_widget->initialize();
  observer_widget->show();

  // Access the QTableView like this in TableView mode:
  // obse