anchor.diff:    FileState._(this._fsState, this.fileUri);
   
     /// The content of the file.
  -  String get content => _content;
  -
  -  /// The content bytes of the file.
  -  List<int> get contentBytes => _contentBytes;
  +  List<int> get content => _content;
   
     /// Whether the file exists.
     bool get exists => _exists;
  
positive.code:   _FileSystemViewEntry(this.uri, this.file);
  
    @override
    Future<bool> exists() async => file?.exists ?? false;
  
    @override
    Future<DateTime> lastModified() async {
      throw new StateError(
          'FileSystemViewEntry modification stamp should not be queried');
    }
  
    @override
    Future<List<int>> readAsBytes() async {
      _throwIfDoesNotExist();
      return file.contentBytes;
    }
  
    @override
    Future<String> readAsString() async {
      _throwIfDoesNotExist();
      return file.content;
    }
  
    void _throwIfDoesNotExist() {
      if (file == null) {
        throw new FileSystemException(uri, 'File $uri does not exist.');
      }
    }
  }
  
negative.code: // BSD-style license that can be found in the LICENSE file.
  
  import 'dart:async';
  import 'dart:typed_data';
  
  import 'package:front_end/file_system.dart';
  