anchor.diff:    /*late*/ bool _shouldDrawProgress;
   
     /// The width of the terminal, in terms of characters.
  -  /*late*/ int _width;
  +  /*late*/
  +  int _width;
   
     final Logger _logger;
   
     /// The inner width of the terminal, in terms of characters.
     ///
     /// This represents the number of characters available for drawing progress.
  -  /*late*/ int _innerWidth;
  +  /*late*/
  +  int _innerWidth;
   
     final int _totalTickCount;
   
  
positive.code:   static const String migrationGuideLink =
        'See https://dart.dev/go/null-safety-migration for a migration guide.';
  
    static const String preFlagFlipCaveat =
        'Note: this tool is currently running on an SDK version where null '
        'safety is not yet enabled by default. You may encounter issues in the '
        'migration process - some aspects of the toolchain assume that they are '
        'running on an SDK where null safety has been enabled by default.';
  
    /// Return whether the SDK has null safety on by default.
    static bool get nullSafetyOnByDefault => IsEnabledByDefault.non_nullable;
  
  
negative.code:   }
  
    @override
    String get description => '$cmdDescription\n\n$migrationGuideLink';
  
    @override
    String get invocation {
  