anchor.diff:        print(e);
       }
       final response = next(request, context);
  -    response.then((value) => print(utf8.decode(value))).catchError(print);
  +    await response.then((value) => print(utf8.decode(value))).catchError(print);
       return response;
     }
   
  
positive.code:     if (!enabled) return next(name, args, context);
      var a = '';
      try {
        a = json.encode((args.length > 0 && args.last is Context)
            ? args.sublist(0, args.length - 1)
            : args);
      } catch (e) {
        print(e);
      }
      final result = next(name, args, context);
      result
          .then((value) => print(
              '${name}(${a.substring(1, a.length - 1)}) = ${json.encode(value)}'))
          .catchError(print);
  
negative.code: |                                                          |
  | Log plugin for Dart.                                     |
  |                                                          |
  | LastModified: Mar 10, 2019                               |
  | Author: Ma Bingyao <andot@hprose.com>                    |
  |                                                          |
  \*________________________________________________________*/
  