TabBarSelection没有这样的方法错误(TabBarSelection No such method error)

我正在试图制作一个简单的标签页

class NotePageState extends State<NotePage> { @override Widget build(BuildContext context) { final List<Note> _notes = <Note>[new Note(title: "Note 1", description: "Description 1"), new Note(title: "Note 3", description: "Description 2")]; return new Scaffold( appBar: new AppBar( // Here we take the value from the MyHomePage object that // was created by the App.build method, and use it to set // our appbar title. title: new Text("Title"), ), body: new TabBarSelection<Note>( values:_notes, key: new GlobalKey(), child: new TabBarView<Note>( key : new GlobalKey(), children: _notes.map((Note note) { new NoteContainer(note); }).toList() ) ) ); }

但我得到了：

0 Object._noSuchMethod (dart:core-patch/object_patch.dart:44) 1 Object.noSuchMethod (dart:core-patch/object_patch.dart:47) 2 KeyedSubtree.KeyedSubtree.wrap (package:flutter/src/widgets/basic.dart:3092:21) 3 _TabBarViewState._updateItemsFromChildren (package:flutter/src/material/tabs.dart:1152:11) 4 _TabBarViewState._updateItemsForSelectedIndex (package:flutter/src/material/tabs.dart:1161:7) 5 _TabBarViewState._updateItemsAndScrollBehavior (package:flutter/src/material/tabs.dart:1183:5) 6 _TabBarViewState._initSelection (package:flutter/src/material/tabs.dart:1128:7) 7 _TabBarViewState.buildContent (package:flutter/src/material/tabs.dart:1263:5) 8 ScrollableState.build (package:flutter/src/widgets/scrollable.dart:776:16) 9 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:2895:23) 10 BuildableElement.rebuild (package:flutter/src/widgets/framework.dart:2784:5) 11 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:2875:5) 12 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3013:22) 13 ComponentElement.mount (package:flutter/src/widgets/framework.dart:2870:5) 14 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 15 Element.updateChild (package:flutter/src/widgets/framework.dart:2076:12) 16 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:2907:16) 17 BuildableElement.rebuild (package:flutter/src/widgets/framework.dart:2784:5) 18 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:2875:5) 19 ComponentElement.mount (package:flutter/src/widgets/framework.dart:2870:5) 20 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 21 Element.updateChild (package:flutter/src/widgets/framework.dart:2076:12) 22 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:2907:16) 23 BuildableElement.rebuild (package:flutter/src/widgets/framework.dart:2784:5) 24 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:2875:5) 25 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3013:22) 26 ComponentElement.mount (package:flutter/src/widgets/framework.dart:2870:5) 27 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 28 Element.updateChild (package:flutter/src/widgets/framework.dart:2076:12) 29 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:2907:16) 30 BuildableElement.rebuild (package:flutter/src/widgets/framework.dart:2784:5) 31 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:2875:5) 32 ComponentElement.mount (package:flutter/src/widgets/framework.dart:2870:5) 33 ParentDataElement.mount (package:flutter/src/widgets/framework.dart:3196:16) 34 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 35 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:3939:32) 36 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 37 Element.updateChild (package:flutter/src/widgets/framework.dart:2076:12) 38 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:2907:16) 39 BuildableElement.rebuild (package:flutter/src/widgets/framework.dart:2784:5) 40 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:2875:5) 41 ComponentElement.mount (package:flutter/src/widgets/framework.dart:2870:5) 42 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 43 Element.updateChild (package:flutter/src/widgets/framework.dart:2076:12) 44 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:2907:16) 45 BuildableElement.rebuild (package:flutter/src/widgets/framework.dart:2784:5) 46 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:2875:5) 47 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3013:22) 48 ComponentElement.mount (package:flutter/src/widgets/framework.dart:2870:5) 49 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 50 Element.updateChild (package:flutter/src/widgets/framework.dart:2076:12) 51 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:3843:14) 52 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2248:14) 53 Element.updateChild (package:flutter/src/widgets/framework.dart:2076:12) 54 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:2907:16) 55 BuildableElement.rebuild (package:flutter/src/widgets/framework.dart:2784:5) 56 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:2875:5) 57 ComponentElement.mount (package:flutter/src/widgets/framework.dart:2870:5)

I am trying to make a simple tabbed page with

But I got: