anchor.diff:  
   @patch
   Object inspect(Object object) {
  +  // Note: this log level does not show up by default in Chrome.
  +  // This is used for communication with the debugger service.
  +  JS('', 'console.debug("dart.developer.inspect", #)', object);
     return object;
   }
   
  
positive.code:     Zone zone,
      Object error,
      StackTrace stackTrace}) {
    // TODO.
  }
  
  final _extensions = Map<String, ServiceExtensionHandler>();
  
negative.code: @patch
  _registerExtension(String method, ServiceExtensionHandler handler) {
    _extensions[method] = handler;
    JS('', 'console.debug("dart.developer.registerExtension", #)', method);
  }
  
  @patch
  void _postEvent(String eventKind, String eventData) {
    JS('', 'console.debug("dart.developer.postEvent", #, #)', eventKind,
        eventData);
  }
  
  @patch
  