@Nullable
public GroupNodeRealizer getGroupNodeRealizer() {
final GroupNodeRealizer groupNodeRealizer = super.getGroupNodeRealizer();
assert groupNodeRealizer != null;
final NodeLabel nodeLabel = groupNodeRealizer.getLabel();
nodeLabel.setText(" " + getGroupName());
nodeLabel.setModel(NodeLabel.INTERNAL);
nodeLabel.setPosition(NodeLabel.TOP_RIGHT);
return groupNodeRealizer;
}
};