Image not showing. From Let's Flutter with Dart

base64toImageMemory.dart

import 'package:flutter/material.dart';
import 'dart:convert';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  final bytes = base64.decode(uri.split(',').last);
  @override
  Widget build(BuildContext context) {
    return Image.memory(bytes);
  }
}

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