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[webview_flutter] Expose loadFile and loadHtmlString through app facing package. (flutter#4558)
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‎packages/webview_flutter/webview_flutter/CHANGELOG.md‎

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@@ -1,5 +1,6 @@
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## NEXT
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## 2.4.0
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* Adds support for the `loadFile` and `loadHtmlString` methods.
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* Updates example app Android compileSdkVersion to 31.
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* Integration test fixes.
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* Updates code for new analysis options.

‎packages/webview_flutter/webview_flutter/example/lib/main.dart‎

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@@ -9,6 +9,7 @@ import 'dart:convert';
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import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:webview_flutter/webview_flutter.dart';
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void main() => runApp(MaterialApp(home: WebViewExample()));
@@ -28,6 +29,25 @@ The navigation delegate is set to block navigation to the youtube website.
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</html>
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''';
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const String kLocalExamplePage = '''
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>Load file or HTML string example</title>
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</head>
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<body>
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<h1>Local demo page</h1>
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<p>
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This is an example page used to demonstrate how to load a local file or HTML
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string using the <a href="https://pub.dev/packages/webview_flutter">Flutter
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webview</a> plugin.
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</p>
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</body>
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</html>
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''';
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class WebViewExample extends StatefulWidget {
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@override
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_WebViewExampleState createState() => _WebViewExampleState();
@@ -133,6 +153,8 @@ enum MenuOptions {
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listCache,
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clearCache,
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navigationDelegate,
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loadLocalFile,
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loadHtmlString,
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}
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class SampleMenu extends StatelessWidget {
@@ -171,6 +193,12 @@ class SampleMenu extends StatelessWidget {
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case MenuOptions.navigationDelegate:
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_onNavigationDelegateExample(controller.data!, context);
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break;
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case MenuOptions.loadLocalFile:
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_onLoadLocalFileExample(controller.data!, context);
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break;
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case MenuOptions.loadHtmlString:
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_onLoadHtmlStringExample(controller.data!, context);
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break;
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}
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},
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itemBuilder: (BuildContext context) => <PopupMenuItem<MenuOptions>>[
@@ -203,6 +231,14 @@ class SampleMenu extends StatelessWidget {
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value: MenuOptions.navigationDelegate,
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child: Text('Navigation Delegate example'),
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),
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const PopupMenuItem<MenuOptions>(
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value: MenuOptions.loadHtmlString,
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child: Text('Load HTML string'),
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),
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const PopupMenuItem<MenuOptions>(
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value: MenuOptions.loadLocalFile,
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child: Text('Load local file'),
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),
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],
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);
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},
@@ -279,6 +315,18 @@ class SampleMenu extends StatelessWidget {
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await controller.loadUrl('data:text/html;base64,$contentBase64');
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}
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Future<void> _onLoadLocalFileExample(
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WebViewController controller, BuildContext context) async {
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final String pathToIndex = await _prepareLocalFile();
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await controller.loadFile(pathToIndex);
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}
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Future<void> _onLoadHtmlStringExample(
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WebViewController controller, BuildContext context) async {
327+
await controller.loadHtmlString(kLocalExamplePage);
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}
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282330
Widget _getCookieList(String cookies) {
283331
if (cookies == null || cookies == '""') {
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return Container();
@@ -292,6 +340,17 @@ class SampleMenu extends StatelessWidget {
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children: cookieWidgets.toList(),
293341
);
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}
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static Future<String> _prepareLocalFile() async {
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final String tmpDir = (await getTemporaryDirectory()).path;
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final File indexFile = File(
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<String>{tmpDir, 'www', 'index.html'}.join(Platform.pathSeparator));
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await indexFile.create(recursive: true);
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await indexFile.writeAsString(kLocalExamplePage);
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return indexFile.path;
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}
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}
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class NavigationControls extends StatelessWidget {

‎packages/webview_flutter/webview_flutter/example/pubspec.yaml‎

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@@ -9,6 +9,7 @@ environment:
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dependencies:
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flutter:
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sdk: flutter
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path_provider: ^2.0.6
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webview_flutter:
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# When depending on this package from a real application you should use:
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# webview_flutter: ^x.y.z

‎packages/webview_flutter/webview_flutter/lib/src/webview.dart‎

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@@ -496,6 +496,35 @@ class WebViewController {
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WebView _widget;
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/// Loads the file located at the specified [absoluteFilePath].
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///
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/// The [absoluteFilePath] parameter should contain the absolute path to the
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/// file as it is stored on the device. For example:
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/// `/Users/username/Documents/www/index.html`.
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///
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/// Throws an ArgumentError if the [absoluteFilePath] does not exist.
506+
Future<void> loadFile(
507+
String absoluteFilePath,
508+
) {
509+
assert(absoluteFilePath.isNotEmpty);
510+
return _webViewPlatformController.loadFile(absoluteFilePath);
511+
}
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513+
/// Loads the supplied HTML string.
514+
///
515+
/// The [baseUrl] parameter is used when resolving relative URLs within the
516+
/// HTML string.
517+
Future<void> loadHtmlString(
518+
String html, {
519+
String? baseUrl,
520+
}) {
521+
assert(html.isNotEmpty);
522+
return _webViewPlatformController.loadHtmlString(
523+
html,
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baseUrl: baseUrl,
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);
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}
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/// Loads the specified URL.
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///
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/// If `headers` is not null and the URL is an HTTP URL, the key value paris in `headers` will

‎packages/webview_flutter/webview_flutter/pubspec.yaml‎

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@@ -2,7 +2,7 @@ name: webview_flutter
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description: A Flutter plugin that provides a WebView widget on Android and iOS.
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repository: https://github.com/flutter/plugins/tree/master/packages/webview_flutter/webview_flutter
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issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+webview%22
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version: 2.3.1
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version: 2.4.0
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environment:
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sdk: ">=2.14.0 <3.0.0"
@@ -19,7 +19,7 @@ flutter:
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dependencies:
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flutter:
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sdk: flutter
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webview_flutter_android: ^2.3.1
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webview_flutter_android: ^2.4.0
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webview_flutter_platform_interface: ^1.5.2
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webview_flutter_wkwebview: ^2.4.0
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‎packages/webview_flutter/webview_flutter/test/webview_flutter_test.dart‎

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@@ -88,6 +88,98 @@ void main() {
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expect(disabledparams.webSettings!.javascriptMode, JavascriptMode.disabled);
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});
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testWidgets('Load file', (WidgetTester tester) async {
92+
WebViewController? controller;
93+
await tester.pumpWidget(
94+
WebView(
95+
onWebViewCreated: (WebViewController webViewController) {
96+
controller = webViewController;
97+
},
98+
),
99+
);
100+
101+
expect(controller, isNotNull);
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103+
await controller!.loadFile('/test/path/index.html');
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105+
verify(mockWebViewPlatformController.loadFile(
106+
'/test/path/index.html',
107+
));
108+
});
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110+
testWidgets('Load file with empty path', (WidgetTester tester) async {
111+
WebViewController? controller;
112+
await tester.pumpWidget(
113+
WebView(
114+
onWebViewCreated: (WebViewController webViewController) {
115+
controller = webViewController;
116+
},
117+
),
118+
);
119+
120+
expect(controller, isNotNull);
121+
122+
expect(() => controller!.loadFile(''), throwsAssertionError);
123+
});
124+
125+
testWidgets('Load HTML string without base URL', (WidgetTester tester) async {
126+
WebViewController? controller;
127+
await tester.pumpWidget(
128+
WebView(
129+
onWebViewCreated: (WebViewController webViewController) {
130+
controller = webViewController;
131+
},
132+
),
133+
);
134+
135+
expect(controller, isNotNull);
136+
137+
await controller!.loadHtmlString('<p>This is a test paragraph.</p>');
138+
139+
verify(mockWebViewPlatformController.loadHtmlString(
140+
'<p>This is a test paragraph.</p>',
141+
));
142+
});
143+
144+
testWidgets('Load HTML string with base URL', (WidgetTester tester) async {
145+
WebViewController? controller;
146+
await tester.pumpWidget(
147+
WebView(
148+
onWebViewCreated: (WebViewController webViewController) {
149+
controller = webViewController;
150+
},
151+
),
152+
);
153+
154+
expect(controller, isNotNull);
155+
156+
await controller!.loadHtmlString(
157+
'<p>This is a test paragraph.</p>',
158+
baseUrl: 'https://flutter.dev',
159+
);
160+
161+
verify(mockWebViewPlatformController.loadHtmlString(
162+
'<p>This is a test paragraph.</p>',
163+
baseUrl: 'https://flutter.dev',
164+
));
165+
});
166+
167+
testWidgets('Load HTML string with empty string',
168+
(WidgetTester tester) async {
169+
WebViewController? controller;
170+
await tester.pumpWidget(
171+
WebView(
172+
onWebViewCreated: (WebViewController webViewController) {
173+
controller = webViewController;
174+
},
175+
),
176+
);
177+
178+
expect(controller, isNotNull);
179+
180+
expect(() => controller!.loadHtmlString(''), throwsAssertionError);
181+
});
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91183
testWidgets('Load url', (WidgetTester tester) async {
92184
WebViewController? controller;
93185
await tester.pumpWidget(

‎packages/webview_flutter/webview_flutter/test/webview_flutter_test.mocks.dart‎

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@@ -1,7 +1,3 @@
1-
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Mocks generated by Mockito 5.0.16 from annotations
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// in webview_flutter/test/webview_flutter_test.dart.
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// Do not manually edit this file.
@@ -81,12 +77,28 @@ class MockWebViewPlatformController extends _i1.Mock
8177
_i1.throwOnMissingStub(this);
8278
}
8379

80+
@override
81+
_i9.Future<void> loadFile(String? absoluteFilePath) =>
82+
(super.noSuchMethod(Invocation.method(#loadFile, [absoluteFilePath]),
83+
returnValue: Future<void>.value(),
84+
returnValueForMissingStub: Future<void>.value()) as _i9.Future<void>);
85+
@override
86+
_i9.Future<void> loadHtmlString(String? html, {String? baseUrl}) =>
87+
(super.noSuchMethod(
88+
Invocation.method(#loadHtmlString, [html], {#baseUrl: baseUrl}),
89+
returnValue: Future<void>.value(),
90+
returnValueForMissingStub: Future<void>.value()) as _i9.Future<void>);
8491
@override
8592
_i9.Future<void> loadUrl(String? url, Map<String, String>? headers) =>
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(super.noSuchMethod(Invocation.method(#loadUrl, [url, headers]),
8794
returnValue: Future<void>.value(),
8895
returnValueForMissingStub: Future<void>.value()) as _i9.Future<void>);
8996
@override
97+
_i9.Future<void> loadRequest(_i4.WebViewRequest? request) =>
98+
(super.noSuchMethod(Invocation.method(#loadRequest, [request]),
99+
returnValue: Future<void>.value(),
100+
returnValueForMissingStub: Future<void>.value()) as _i9.Future<void>);
101+
@override
90102
_i9.Future<void> updateSettings(_i4.WebSettings? setting) =>
91103
(super.noSuchMethod(Invocation.method(#updateSettings, [setting]),
92104
returnValue: Future<void>.value(),

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