static class DynamicObject {
  S className; // just the name, without the "main$"
  
  // string key = dynamic field
  // interface key = dynamic interface
  LinkedHashMap/*<S, O>*/ fieldValues; // dropped the type parameters 2021/5/19 to allow for dynamic interfaces
  
  *() {}
  // className = just the name, without the "main$"
  *(S *className) {}
  
  Map<S, O> _map() { ret fieldValues; }
  
  toString {
    ret getClass() == DynamicObject.class ? "dyn " + className
      : super.toString();
  }
}