static O getOpt(O o, S field) {
  ret getOpt_cached(o, field);
}

static O mapMethodLike getOpt(S field, O o) {
  ret getOpt_cached(o, field);
}

static Object getOpt_raw(Object o, String field) ctex {
  Field f = getOpt_findField(o.getClass(), field);
  if (f == null) null;
  makeAccessible(f);
  ret f.get(o);
}

// access of static fields is not yet optimized
static O getOpt(Class c, String field) ctex {
  if (c == null) null;
  Field f = getOpt_findStaticField(c, field);
  if (f == null) null;
  makeAccessible(f);
  ret f.get(null);
}

static Field getOpt_findStaticField(Class<?> c, String field) {
  Class _c = c;
  do {
    for (Field f : _c.getDeclaredFields())
      if (f.getName().equals(field) && (f.getModifiers() & java.lang.reflect.Modifier.STATIC) != 0)
        return f;
    _c = _c.getSuperclass();
  } while (_c != null);
  ret null;
}

Began life as a copy of #1000597