code: @Override
    public void layoutParts() {
      node.getChildren().addAll(slider, valueLabel);
      HBox.setHgrow(slider, Priority.ALWAYS);
      valueLabel.setAlignment(Pos.CENTER);
      valueLabel.setMinWidth(VALUE_LABEL_PADDING);
      node.setSpacing(VALUE_LABEL_PADDING);
      HBox.setMargin(valueLabel, new Insets(0, VALUE_LABEL_PADDING, 0, 0));
    }
docs: {@inheritDoc}