anchor.diff:    @override
     void logLogEntry(String level, DateTime? time, String message,
         Object exception, StackTrace stackTrace) {
  -    if (_instrumentationLogger != null) {
  -      String timeStamp =
  -          time == null ? 'null' : time.millisecondsSinceEpoch.toString();
  -      String exceptionText = exception.toString();
  -      String stackTraceText = stackTrace.toString();
  -      _instrumentationLogger!.log(_join([
  -        TAG_LOG_ENTRY,
  -        level,
  -        timeStamp,
  -        message,
  -        exceptionText,
  -        stackTraceText
  -      ]));
  -    }
  +    String timeStamp =
  +        time == null ? 'null' : time.millisecondsSinceEpoch.toString();
  +    String exceptionText = exception.toString();
  +    String stackTraceText = stackTrace.toString();
  +    _instrumentationLogger.log(_join([
  +      TAG_LOG_ENTRY,
  +      level,
  +      timeStamp,
  +      message,
  +      exceptionText,
  +      stackTraceText
  +    ]));
     }
   
     @override
  
positive.code:     String normalize(String? value) =>
          value != null && value.isNotEmpty ? value : 'unknown';
  
      if (_instrumentationLogger != null) {
        _instrumentationLogger!.log(_join([
          TAG_VERSION,
          uuid,
          normalize(clientId),
          normalize(clientVersion),
          serverVersion,
          sdkVersion
        ]));
      }
    }
  
    @override
    void logWatchEvent(String folderPath, String filePath, String changeType) {
      if (_instrumentationLogger != null) {
        _instrumentationLogger!
            .log(_join([TAG_WATCH_EVENT, folderPath, filePath, changeType]));
      }
    }
  
    @override
    Future<void> shutdown() async {
      await _instrumentationLogger?.shutdown();
    }
  
    /// Write an escaped version of the given [field] to the given [buffer].
  
negative.code: 
    /// Log the given message with the given tag.
    void _log(String tag, String message) {
      _instrumentationLogger.log(_join([tag, message]));
    }
  
    /// Convert the given [object] to a string.
  