static Map<S, O> callAllMethodsInInterface(O o, Class intrface) {
  new TreeMap<S, O> map;
  for (Method m : intrface.getDeclaredMethods()) {
    if (!empty(m.getParameterTypes())) continue;
    S name = m.getName();
    try {
      map.put(name, call(o, name));
    } catch e {
      map.put(name, e);
    }
  }
  ret map;
}