public void setIsValid(final boolean valid) {
    for (int i = 0; i < myRoot.getChildCount(); i++) {
      final MyNode node = (MyNode) myRoot.getChildAt(i);
      final GroupConfigurable groupConfigurable = (GroupConfigurable) node.getConfigurable();
      groupConfigurable.setIsValid(valid);
    }
  }
public void setIsValid(final boolean valid)