// c = Component or something implementing swing()
static JComponent wrap(O swingable) {
  ret _recordNewSwingComponent(wrap_2(swingable));
}

static JComponent wrap_2(O swingable) {
  if (swingable == null) null;
  JComponent c;
  if (swingable cast Component) c = componentToJComponent(swingable);
  ifclass Swingable
    else if (swingable instanceof Swingable) c = componentToJComponent(swingable/Swingable.visualize());
  endif
  else c = componentToJComponent((Component) callOpt(swingable, "swing"));
  if (c instanceof JTable || c instanceof JList
    || c instanceof JTextArea || c instanceof JEditorPane
    || c instanceof JTextPane || c instanceof JTree)
    ret jscroll(c);
  ret c == null ? jlabel(str(swingable)) : c;
}