static new ThreadLocal<Boolean> DynamicObject_loading;

static class DynamicObject {
  S className; // just the name, without the "main$"
  LinkedHashMap<S, O> fieldValues;
  
  *() {}
  // className = just the name, without the "main$"
  *(S *className) {}
  
  Map<S, O> _map() { ret fieldValues; }
  
  toString {
    ret getClass() == DynamicObject.class ? "dyn " + className
      : super.toString();
  }
}