@Override
  public void initChildren() {
    clearChildren();
    Group group = getValue();
    Collection<TreeElement> children = group.getChildren();
    for (TreeElement child : children) {
      if (child == null) {
        LOG.error(group + " returned null child: " + children);
      }
      TreeElementWrapper childNode = createChildNode(child);
      addSubElement(childNode);
    }
  }
@Override
  public void initChildren()