@Override
  public CompoundReferenceRenderer clone() {
    CompoundReferenceRenderer renderer = (CompoundReferenceRenderer)super.clone();
    renderer.myLabelRenderer = (myLabelRenderer != null) ? (ValueLabelRenderer)myLabelRenderer.clone() : null;
    renderer.myChildrenRenderer = (myChildrenRenderer != null) ? (ChildrenRenderer)myChildrenRenderer.clone() : null;
    return renderer;
  }
@Override
  public CompoundReferenceRenderer clone()