@Override
  public String[] getButtonGroupComponentIds(String groupName) {
    for (LwButtonGroup group : myButtonGroups) {
      if (group.getName().equals(groupName)) {
        return group.getComponentIds();
      }
    }
    throw new IllegalArgumentException("Cannot find group " + groupName);
  }
@Override
  public String[] getButtonGroupComponentIds(String groupName)