private void displayCurrentPage() {
   updateLocationBar();
   PageContext pageContext = back.peek();
   primaryStage.setTitle(pageContext.getPage().getTitle());
   try {
     layout = layout(pageContext);
   } catch (QueryException e) {
     log.error("Unable to display page", e);
     return;
   }
   anchor.getChildren().setAll(layout);
 }