static <A extends Component> A setFormData(SS data, A form) {
  ret setFormData(form, data);
}

static <A extends Component> A setFormData(A form, SS data) {
  if (!empty(data))
    for (Component c : allChildren(form)) {
      S id = componentID(c);
      if (id == null) continue;
      S value = data.get(id);
      if (value == null) continue;
      for (Component c2 : allChildren(c))
        if (c2 instanceof JTextComponent)
          setText((JTextComponent) c2, value);
    }
  ret form;
}