@Override
  public StringDescriptor getTabProperty(IComponent component, final String propName) {
    final HashMap<String, LwTabbedPane.Constraints> id2Constraints = getId2Constraints(this);
    final LwTabbedPane.Constraints constraints = id2Constraints.get(component.getId());
    return constraints == null ? null : constraints.getProperty(propName);
  }
@Override
  public StringDescriptor getTabProperty(IComponent component, final String propName)