code: @Override
      protected void initView() {
          super.initView();
  
          node().setStyle("-fx-background-color:white");
          node().setPadding(new Insets(10, 20, 10, 20));
          node().setSpacing(40);
          node().setAlignment(Pos.CENTER);
  
          this.summary = new Label("0 item left");
          HBox.setMargin(this.summary, new Insets(10, 80, 10, 10));
  
          this.group = new ToggleGroup();
  
          this.all = new ToggleButton("All");
          this.all.setUserData(FilterKind.All);
          this.all.setToggleGroup(this.group);
  
          this.active = new ToggleButton("Active");
          this.active.setUserData(FilterKind.Undone);
          this.active.setToggleGroup(this.group);
  
          this.completed = new ToggleButton("Done");
          this.completed.setUserData(FilterKind.Done);
          this.completed.setToggleGroup(this.group);
  
          this.all.setSelected(true);
  
          node().getChildren().addAll(this.summary, this.all, this.active, this.completed);
  
      }
docs: {@inheritDoc}