public List<RadComponent> getGroupContents(final RadButtonGroup group) {
    ArrayList<RadComponent> result = new ArrayList<>();
    for(String id: group.getComponentIds()) {
      RadComponent component = (RadComponent) FormEditingUtil.findComponent(this, id);
      if (component != null) {
        result.add(component);
      }
    }
    return result;
  }
public List<RadComponent> getGroupContents(final RadButtonGroup group)