@Override
    public int hashCode() {
      int result;
      result = (myParent != null ? myParent.hashCode() : 0);
      result = 31 * result + (myDescr != null ? myDescr.hashCode() : 0);
      result = 31 * result + (myName != null ? myName.hashCode() : 0);
      result = 31 * result + myIndex;
      return result;
    }
@Override
    public int hashCode()