anchor.diff:            .then(_me);
   
     @override
  -  Future<Uint8List> readAsBytes() => ioWrap(ioFile.readAsBytes());
  +  Future<Uint8List> readAsBytes() async =>
  +      asUint8List(await ioWrap(ioFile.readAsBytes()));
   
     @override
     Future<String> readAsString({Encoding encoding = utf8}) =>
  
positive.code: 
    @override
    Stream<Uint8List> openRead([int start, int end]) {
      return IoReadFileStreamCtrl(ioFile.openRead(start, end)).stream;
    }
  
    @override
  
negative.code: 
  import 'package:fs_shim/fs.dart' as fs;
  import 'package:fs_shim/fs_io.dart';
  import 'package:fs_shim/src/common/compat.dart';
  
  import 'io_file_system_entity.dart';
  import 'io_fs.dart';
  