anchor.diff:    }
   
     /// Return the absolute path of the user's home directory.
  -  String get homeDirPath {
  -    String path = _platform.isWindows
  +  String? get homeDirPath {
  +    String? path = _platform.isWindows
         ? _platform.environment['USERPROFILE']
         : _platform.environment['HOME'];
       if (path != null) {
  
positive.code: // Copyright 2014 The Flutter Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  // @dart = 2.8
  
  import 'package:file/file.dart';
  import 'package:file/local.dart' as local_fs;
  
negative.code:         _tryToDeleteTemp,
        );
      }
      return _systemTemp!;
    }
  }
  