import 'package:flutter/material.dart';final Color darkBlue = Color.fromARGB(255, 18, 32, 47);void main() {  runApp(MyApp());}class MyApp extends StatelessWidget {  @override  Widget build(BuildContext context) {    return MaterialApp(      debugShowCheckedModeBanner: false,      home: Scaffold(        body: Center(          child: DefaultTabController(              length: 2,              child: NestedScrollView(                  headerSliverBuilder:                      (BuildContext context, bool innerBoxIsScrolled) {                    return [                      SliverOverlapAbsorber(                        handle: NestedScrollView.sliverOverlapAbsorberHandleFor(                            context),                        sliver: SliverAppBar(                          pinned: true,                          expandedHeight: 240,                          floating: true,                          flexibleSpace: FlexibleSpaceBar(                            background: Container(                              height: 200,                              color: Colors.red,                            ),                          ),                          bottom: TabBar(tabs: [                            Tab(                              text: '1',                            ),                            Tab(                              text: '2',                            ),                          ]),                        ),                      ),                    ];                  },                  body: TabBarView(children: [Center(),Center(),]))),        ),      ),    );  }}

NoSuchMethodError: method not found: 'get$value' on nulljs_primitives.dart:47     at _TabBarState.get$_indicator (http://localhost:51322/main.dart.js:70701:17)js_primitives.dart:47     at _TabBarState._initIndicatorPainter$0 (http://localhost:51322/main.dart.js:70745:20)js_primitives.dart:47     at _TabBarState.didChangeDependencies$0 (http://localhost:51322/main.dart.js:70766:12)js_primitives.dart:47     at StatefulElement._firstBuild$0 (http://localhost:51322/main.dart.js:91626:19)js_primitives.dart:47     at StatefulElement.mount$2 (http://localhost:51322/main.dart.js:91498:12)js_primitives.dart:47     at MultiChildRenderObjectElement.inflateWidget$2 (http://localhost:51322/main.dart.js:91273:16)js_primitives.dart:47     at MultiChildRenderObjectElement.mount$2 (http://localhost:51322/main.dart.js:92085:26)js_primitives.dart:47     at InheritedElement.inflateWidget$2 (http://localhost:51322/main.dart.js:91273:16)js_primitives.dart:47     at InheritedElement.updateChild$3 (http://localhost:51322/main.dart.js:91197:26)js_primitives.dart:47     at InheritedElement.performRebuild$0 (http://localhost:51322/main.dart.js:91521:41)

Analyzing demo_bug...No issues found! (ran in 1.0s)

[√] Flutter (Channel stable, 2.2.2, on Microsoft Windows [Version 10.0.19043.1055], locale zh-CN)    • Flutter version 2.2.2 at C:\Develop\flutter    • Framework revision d79295af24 (12 days ago), 2021-06-11 08:56:01 -0700    • Engine revision 91c9fc8fe0    • Dart version 2.13.3    • Flutter download mirror "https://mirrors.tuna.tsinghua.edu.cn/flutter"[!] Android toolchain - develop for Android devices (Android SDK version 30.0.3)    • Android SDK at C:\Users\zzy\AppData\Local\Android\sdk    • Platform android-30, build-tools 30.0.3    • Java binary at: C:\Develop\jdk-11\bin\java    • Java version OpenJDK Runtime Environment 18.9 (build 11+28)    X Android license status unknown.      Run `flutter doctor --android-licenses` to accept the SDK licenses.      See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.[√] Chrome - develop for the web    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe[!] Android Studio (not installed)    • Android Studio not found; download from https://developer.android.com/studio/index.html      (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).[√] Connected device (2 available)    • Chrome (web) • chrome • web-javascript • Google Chrome 91.0.4472.114    • Edge (web)   • edge   • web-javascript • Microsoft Edge 91.0.864.54! Doctor found issues in 2 categories.