final boolean nameVisible = attributeGroup.getName() != null;
if (nameVisible) {
// TODO set styleable
collapseLabel = new CollapseLabel();
collapseLabel.widthProperty().bind(this.clientWidthProperty());
collapseLabel.textProperty().set(attributeGroup.getName());
collapseLabel.collapsedProperty().bidirectionalBind(collapsed);
root.getChildren().add(collapseLabel);