code: @Override
      protected void initView() {
          this.showEmbedded = new ToggleButton("Embedded");
          this.showStandalone = new ToggleButton("Standalone");
          this.showHybrid = new ToggleButton("Hybrid");
          this.showIncluded = new ToggleButton("Included");
  
          final ToggleGroup group = new PersistentButtonToggleGroup();
          group.getToggles().addAll(this.showEmbedded, this.showStandalone, this.showHybrid, this.showIncluded);
  
          final FlowPane fp = new FlowPane();
          fp.setStyle("-fx-background-color: #2f4f4f;");
          fp.setAlignment(Pos.CENTER);
          fp.setHgap(4);
          fp.getChildren().addAll(this.showEmbedded, this.showStandalone, this.showIncluded, this.showHybrid);
  
          node().setTop(fp);
  
      }
docs: {@inheritDoc}