class ItemGroup extends AbstractItemHierarchy implements ItemInflater.ItemParent, ItemHierarchy.Observer {

  @Override
  public ItemHierarchy findItemById(int id) {
    if (id == getId()) {
      return this;
    }
    for (ItemHierarchy child : children) {
      ItemHierarchy childFindItem = child.findItemById(id);
      if (childFindItem != null) {
        return childFindItem;
      }
    }
    return null;
  }

  public  ItemGroup();
  public  ItemGroup(Context context, AttributeSet attrs);

}