static void callMethodThroughForm(fS methodName, S paramNames) {
  final L<S> params = splitAtSpace(paramNames);
  // L<Class> types = methodArgumentTypes(methodName);
  final Map<S, JComponent> map = litorderedmap();
  for (S p : params)
    map.put(p, jtextfield());
  Runnable r = r {
    new L l;
    for (S p : params) l.add(getText((JTextField) map.get(p)));
    call(mc(), methodName, toObjectArray(l));
  };
  renameSubmitButton("Call", showFormTitled("Call method " + methodName,
    arrayPlus(mapToObjectArray(map), r)));
}