static LL<JComponent> showForm_makeComponents(final Var<JFrame> frame, O... _parts) {
  new LL<JComponent> l;
  L parts = asList(_parts);
  Runnable submit = null;
  for (int i = 0; i < l(parts); i++) {
    final O o = parts.get(i), next = get(parts, i+1);
    if (o instanceof Component || o instanceof S || next instanceof Component) { // smartAdd accepts strings
      l.add(mapLL wrapForSmartAdd(o == null ? new JPanel : o, next));
      if (next instanceof JButton && submit == null)
        submit = r { ((JButton) next).doClick() };
      i++;
    } else if (isRunnable(o))
      l.add(mapLL wrapForSmartAdd(null, jbutton(showFormSubmitButtonName(), submit = r {
        O result = call(o);
        if (neq(Boolean.FALSE, result))
          disposeFrame(frame.get());
      })));
    else print("showForm: Unknown element type: " + getClassName(o));
  }
  onEnterInAllTextFields(concatLists(l), submit);
  
  // massage labels
  for (L<JComponent> row : l) {
    JComponent left = first(row);
    if (left instanceof JLabel) makeBold((JLabel) left).setVerticalAlignment(JLabel.TOP);
  }
  
  ret l;
}