anchor.diff:            endpoint: command,
             startTime: startTime,
             endTime: new DateTime.now(),
  -          result: response != null ? response.toString() : null,
  +          result: response != null ? JSON.encode(response) : null,
             exception: exception != null ? exception.toString() : null,
             stackTrace: new Trace.current(1)));
       }
  
positive.code:       _onCommand.add(new CommandEvent(
            method: 'POST',
            endpoint: command,
            params: params != null ? params.toString() : null,
            startTime: startTime,
            endTime: new DateTime.now(),
            result: response != null ? response.toString() : null,
            exception: exception != null ? exception.toString() : null,
            stackTrace: new Trace.current(1)));
      }
  
negative.code:           endpoint: command,
            startTime: startTime,
            endTime: new DateTime.now(),
            result: response != null ? JSON.encode(response) : null,
            exception: exception != null ? exception.toString() : null,
            stackTrace: new Trace.current(1)));
      }
  