anchor.diff:  
     @override
     Stream<Uint8List> openRead([int start, int end]) {
  -    return IoReadFileStreamCtrl(ioFile.openRead(start, end)).stream;
  +    return IoReadFileStreamCtrl(
  +            intListStreamToUint8ListStream(ioFile.openRead(start, end)))
  +        .stream;
     }
   
     @override
  
positive.code:           .then(_me);
  
    @override
    Future<Uint8List> readAsBytes() => ioWrap(ioFile.readAsBytes());
  
    @override
    Future<String> readAsString({Encoding encoding = utf8}) =>
  
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';
  