anchor.diff:    final IOSSimulator device;
   
     StreamController<String> _linesController;
  -  bool _lastWasFiltered = false;
   
     // We log from two files: the device and the system log.
     Process _deviceProcess;
  
positive.code:            && content.endsWith(']: 0x1'))
           return null;
  
        _lastWasFiltered = false;
  
        if (category == 'Runner')
          return content;
        return '$category: $content';
      }
      match = _lastMessageRegex.matchAsPrefix(string);
      if (match != null && !_lastWasFiltered)
        return '(${match.group(1)})';
      return string;
    }
  
    void _onDeviceLine(String line) {
      String filteredLine = _filterDeviceLine(line);
      if (filteredLine == null)
        return;
      _linesController.add(filteredLine);
    }
  
    String _filterSystemLog(String string) {
  
negative.code: import 'dart:async';
  import 'dart:convert';
  import 'dart:io';
  import 'dart:math' as math;
  
  import 'package:path/path.dart' as path;
  
  