diff --git a/packages/webview_flutter/CHANGELOG.md b/packages/webview_flutter/CHANGELOG.md
index 4bbc7bd7d..929fad45a 100644
--- a/packages/webview_flutter/CHANGELOG.md
+++ b/packages/webview_flutter/CHANGELOG.md
@@ -1,3 +1,13 @@
+## 0.9.0
+
+* Update webivew_flutter to 4.4.2.
+* Update webview_flutter_platform_interface to 2.6.0.
+* Adds pub topics to package metadata.
+* Adds support to retrieve the user agent. See `TizenWebViewController.getUserAgent`.
+* Adds support to register a callback to receive JavaScript console messages. See `TizenWebViewController.setOnConsoleMessage`.
+* Apply PlatformView API change.
+* Fix bug on playing youtube on TV.
+
 ## 0.8.0
 
 * Update webivew_flutter to 4.2.3.
diff --git a/packages/webview_flutter/README.md b/packages/webview_flutter/README.md
index c4f668d34..a75600ea1 100644
--- a/packages/webview_flutter/README.md
+++ b/packages/webview_flutter/README.md
@@ -22,8 +22,8 @@ This package is not an _endorsed_ implementation of `webview_flutter`. Therefore
 
 ```yaml
 dependencies:
-  webview_flutter: ^4.2.3
-  webview_flutter_tizen: ^0.8.0
+  webview_flutter: ^4.4.2
+  webview_flutter_tizen: ^0.9.0
 ```
 
 ## Example
@@ -59,4 +59,20 @@ class _WebViewExampleState extends State<WebViewExample> {
 
 ## Supported devices
 
-This plugin is only supported on Tizen TV devices running Tizen 5.5 or later.  
+This plugin is only supported on Tizen TV devices running Tizen 5.5 or later.
+
+## Note
+
+To play Youtube, make app's background color to transparent.
+
+```diff
+--- a/packages/webview_flutter/example/lib/main.dart
++++ b/packages/webview_flutter/example/lib/main.dart
+   @override
+   Widget build(BuildContext context) {
+     return Scaffold(
+-       backgroundColor: Colors.green,
++       backgroundColor: Colors.transparent,
+       appBar: AppBar(
+         title: const Text('Flutter WebView example'),
+```
diff --git a/packages/webview_flutter/example/integration_test/webview_flutter_test.dart b/packages/webview_flutter/example/integration_test/webview_flutter_test.dart
index f538e3eff..8322d7adb 100644
--- a/packages/webview_flutter/example/integration_test/webview_flutter_test.dart
+++ b/packages/webview_flutter/example/integration_test/webview_flutter_test.dart
@@ -10,7 +10,6 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:integration_test/integration_test.dart';
@@ -176,7 +175,7 @@ Future<void> main() async {
 
     await pageFinished.future;
 
-    final String customUserAgent = await _getUserAgent(controller);
+    final String? customUserAgent = await controller.getUserAgent();
     expect(customUserAgent, 'Custom_User_Agent1');
   });
 
@@ -477,23 +476,6 @@ Future<void> main() async {
   });
 }
 
-/// Returns the value used for the HTTP User-Agent: request header in subsequent HTTP requests.
-Future<String> _getUserAgent(WebViewController controller) async {
-  return _runJavascriptReturningResult(controller, 'navigator.userAgent;');
-}
-
-Future<String> _runJavascriptReturningResult(
-  WebViewController controller,
-  String js,
-) async {
-  if (defaultTargetPlatform == TargetPlatform.iOS ||
-      defaultTargetPlatform == TargetPlatform.linux) {
-    return await controller.runJavaScriptReturningResult(js) as String;
-  }
-  return jsonDecode(await controller.runJavaScriptReturningResult(js) as String)
-      as String;
-}
-
 class ResizableWebView extends StatefulWidget {
   const ResizableWebView({
     super.key,
diff --git a/packages/webview_flutter/example/lib/main.dart b/packages/webview_flutter/example/lib/main.dart
index 8265578d8..cdd059f42 100644
--- a/packages/webview_flutter/example/lib/main.dart
+++ b/packages/webview_flutter/example/lib/main.dart
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// ignore_for_file: public_member_api_docs, avoid_print
+// ignore_for_file: public_member_api_docs
 
 import 'dart:async';
 import 'dart:convert';
@@ -70,6 +70,40 @@ const String kTransparentBackgroundPage = '''
   </html>
 ''';
 
+const String kLogExamplePage = '''
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<title>Load file or HTML string example</title>
+</head>
+<body onload="console.log('Logging that the page is loading.')">
+
+<h1>Local demo page</h1>
+<p>
+  This page is used to test the forwarding of console logs to Dart.
+</p>
+
+<style>
+    .btn-group button {
+      padding: 24px; 24px;
+      display: block;
+      width: 25%;
+      margin: 5px 0px 0px 0px;
+    }
+</style>
+
+<div class="btn-group">
+    <button onclick="console.error('This is an error message.')">Error</button>
+    <button onclick="console.warn('This is a warning message.')">Warning</button>
+    <button onclick="console.info('This is a info message.')">Info</button>
+    <button onclick="console.debug('This is a debug message.')">Debug</button>
+    <button onclick="console.log('This is a log message.')">Log</button>
+</div>
+
+</body>
+</html>
+''';
+
 class WebViewExample extends StatefulWidget {
   const WebViewExample({super.key});
 
@@ -152,7 +186,7 @@ Page resource error:
     return FloatingActionButton(
       onPressed: () async {
         final String? url = await _controller.currentUrl();
-        if (context.mounted) {
+        if (mounted) {
           ScaffoldMessenger.of(context).showSnackBar(
             SnackBar(content: Text('Favorited $url')),
           );
@@ -177,6 +211,7 @@ enum MenuOptions {
   loadHtmlString,
   transparentBackground,
   setCookie,
+  logExample,
 }
 
 class SampleMenu extends StatelessWidget {
@@ -233,6 +268,9 @@ class SampleMenu extends StatelessWidget {
           case MenuOptions.setCookie:
             _onSetCookie();
             break;
+          case MenuOptions.logExample:
+            _onLogExample();
+            break;
         }
       },
       itemBuilder: (BuildContext context) => <PopupMenuItem<MenuOptions>>[
@@ -289,6 +327,10 @@ class SampleMenu extends StatelessWidget {
           value: MenuOptions.setCookie,
           child: Text('Set cookie'),
         ),
+        const PopupMenuItem<MenuOptions>(
+          value: MenuOptions.logExample,
+          child: Text('Log example'),
+        ),
       ],
     );
   }
@@ -433,6 +475,16 @@ class SampleMenu extends StatelessWidget {
 
     return indexFile.path;
   }
+
+  Future<void> _onLogExample() {
+    webViewController
+        .setOnConsoleMessage((JavaScriptConsoleMessage consoleMessage) {
+      debugPrint(
+          '== JS == ${consoleMessage.level.name}: ${consoleMessage.message}');
+    });
+
+    return webViewController.loadHtmlString(kLogExamplePage);
+  }
 }
 
 class NavigationControls extends StatelessWidget {
diff --git a/packages/webview_flutter/example/pubspec.yaml b/packages/webview_flutter/example/pubspec.yaml
index c59c02c68..e06c60cb6 100644
--- a/packages/webview_flutter/example/pubspec.yaml
+++ b/packages/webview_flutter/example/pubspec.yaml
@@ -12,7 +12,7 @@ dependencies:
   path_provider: ^2.0.7
   path_provider_tizen:
     path: ../../path_provider/
-  webview_flutter: ^4.2.3
+  webview_flutter: ^4.4.2
   webview_flutter_tizen:
     path: ../
 
diff --git a/packages/webview_flutter/lib/src/tizen_webview.dart b/packages/webview_flutter/lib/src/tizen_webview.dart
index ca2a68f4f..1ed3051de 100644
--- a/packages/webview_flutter/lib/src/tizen_webview.dart
+++ b/packages/webview_flutter/lib/src/tizen_webview.dart
@@ -211,5 +211,11 @@ class TizenWebView {
 
   /// Sets the value used for the HTTP `User-Agent:` request header.
   Future<void> setUserAgent(String? userAgent) =>
-      _invokeChannelMethod<void>('userAgent', userAgent);
+      _invokeChannelMethod<void>('setUserAgent', userAgent);
+
+  /// Gets the HTTP 'User-Agent:' request header.
+  Future<String?> getUserAgent() async {
+    final String? result = await _invokeChannelMethod<String?>('getUserAgent');
+    return result;
+  }
 }
diff --git a/packages/webview_flutter/lib/src/tizen_webview_controller.dart b/packages/webview_flutter/lib/src/tizen_webview_controller.dart
index de79235f2..88a47bb9c 100644
--- a/packages/webview_flutter/lib/src/tizen_webview_controller.dart
+++ b/packages/webview_flutter/lib/src/tizen_webview_controller.dart
@@ -16,6 +16,10 @@ import 'tizen_webview.dart';
 const String kTizenNavigationDelegateChannelName =
     'plugins.flutter.io/tizen_webview_navigation_delegate_';
 
+/// The channel name of [TizenWebViewController].
+const String kTizenWebViewControllerChannelName =
+    'plugins.flutter.io/tizen_webview_controller_';
+
 /// An implementation of [PlatformWebViewController] using the Tizen WebView API.
 class TizenWebViewController extends PlatformWebViewController {
   /// Constructs a [TizenWebViewController].
@@ -26,12 +30,60 @@ class TizenWebViewController extends PlatformWebViewController {
   final TizenWebView _webview;
   late TizenNavigationDelegate _tizenNavigationDelegate;
 
+  void Function(JavaScriptConsoleMessage consoleMessage)? _onConsoleLogCallback;
+
+  late final MethodChannel _webviewControllerChannel;
+
+  /// Called when [TizenView] is created.
+  void createWebviewControllerChannel(int viewId) {
+    _webviewControllerChannel =
+        MethodChannel(kTizenWebViewControllerChannelName + viewId.toString());
+    _webviewControllerChannel.setMethodCallHandler((MethodCall call) async {
+      final Map<String, Object?> arguments =
+          (call.arguments as Map<Object?, Object?>).cast<String, Object?>();
+      switch (call.method) {
+        case 'onConsoleMessage':
+          JavaScriptLogLevel level = JavaScriptLogLevel.log;
+          switch (arguments['level']! as String) {
+            case 'error':
+              level = JavaScriptLogLevel.error;
+              break;
+            case 'warning':
+              level = JavaScriptLogLevel.warning;
+              break;
+            case 'debug':
+              level = JavaScriptLogLevel.debug;
+              break;
+            case 'info':
+              level = JavaScriptLogLevel.info;
+              break;
+            case 'log':
+              level = JavaScriptLogLevel.log;
+              break;
+          }
+
+          if (_onConsoleLogCallback != null) {
+            _onConsoleLogCallback!(JavaScriptConsoleMessage(
+              level: level,
+              message: arguments['message']! as String,
+            ));
+          }
+          return null;
+      }
+
+      throw MissingPluginException(
+        '${call.method} was invoked but has no handler',
+      );
+    });
+  }
+
   /// Called when [TizenView] is created.
   void onCreate(int viewId) {
     _webview.onCreate(viewId);
     if (_webview.hasNavigationDelegate) {
       _tizenNavigationDelegate.createNavigationDelegateChannel(viewId);
     }
+    createWebviewControllerChannel(viewId);
   }
 
   @override
@@ -173,6 +225,20 @@ class TizenWebViewController extends PlatformWebViewController {
         'This version of `TizenWebViewController` currently has no '
         'implementation.');
   }
+
+  /// Sets a callback that notifies the host application of any log messages
+  /// written to the JavaScript console.
+  @override
+  Future<void> setOnConsoleMessage(
+      void Function(JavaScriptConsoleMessage consoleMessage)
+          onConsoleMessage) async {
+    _onConsoleLogCallback = onConsoleMessage;
+  }
+
+  @override
+  Future<String?> getUserAgent() {
+    return _webview.getUserAgent();
+  }
 }
 
 /// An implementation of [PlatformWebViewWidget] with the Tizen WebView API.
diff --git a/packages/webview_flutter/pubspec.yaml b/packages/webview_flutter/pubspec.yaml
index d3becad4e..b22c51928 100644
--- a/packages/webview_flutter/pubspec.yaml
+++ b/packages/webview_flutter/pubspec.yaml
@@ -2,7 +2,7 @@ name: webview_flutter_tizen
 description: Tizen implementation of the webview_flutter plugin.
 homepage: https://github.com/flutter-tizen/plugins
 repository: https://github.com/flutter-tizen/plugins/tree/master/packages/webview_flutter
-version: 0.8.0
+version: 0.9.0
 
 environment:
   sdk: ">=2.18.0 <4.0.0"
@@ -20,5 +20,11 @@ dependencies:
   flutter:
     sdk: flutter
   flutter_tizen: ^0.2.1
-  webview_flutter: ^4.2.3
-  webview_flutter_platform_interface: ^2.3.0
+  webview_flutter: ^4.4.2
+  webview_flutter_platform_interface: ^2.6.0
+
+topics:
+  - html
+  - webview
+  - webview-flutter
+
diff --git a/packages/webview_flutter/tizen/src/ewk_internal_api_binding.cc b/packages/webview_flutter/tizen/src/ewk_internal_api_binding.cc
index 01be2c187..e09a5692d 100644
--- a/packages/webview_flutter/tizen/src/ewk_internal_api_binding.cc
+++ b/packages/webview_flutter/tizen/src/ewk_internal_api_binding.cc
@@ -35,6 +35,8 @@ bool EwkInternalApiBinding::Initialize() {
       dlsym(handle_, "ewk_view_ime_window_set"));
   view.KeyEventsEnabledSet = reinterpret_cast<EwkViewKeyEventsEnabledSetFnPtr>(
       dlsym(handle_, "ewk_view_key_events_enabled_set"));
+  view.SupportVideoHoleSet = reinterpret_cast<EwkViewSupportVideoHoleSetFnPtr>(
+      dlsym(handle_, "ewk_view_set_support_video_hole"));
 
   // ewk_main
   main.SetArguments = reinterpret_cast<EwkSetArgumentsFnPtr>(
@@ -57,8 +59,8 @@ bool EwkInternalApiBinding::Initialize() {
 
   return view.SetBackgroundColor && view.FeedTouchEvent && view.SendKeyEvent &&
          view.OffscreenRenderingEnabledSet && view.ImeWindowSet &&
-         view.KeyEventsEnabledSet && main.SetArguments &&
-         settings.ImePanelEnabledSet && console_message.LevelGet &&
-         console_message.TextGet && console_message.LineGet &&
-         console_message.SourceGet;
+         view.KeyEventsEnabledSet && view.SupportVideoHoleSet &&
+         main.SetArguments && settings.ImePanelEnabledSet &&
+         console_message.LevelGet && console_message.TextGet &&
+         console_message.LineGet && console_message.SourceGet;
 }
diff --git a/packages/webview_flutter/tizen/src/ewk_internal_api_binding.h b/packages/webview_flutter/tizen/src/ewk_internal_api_binding.h
index 499560fb7..c259a9a0a 100644
--- a/packages/webview_flutter/tizen/src/ewk_internal_api_binding.h
+++ b/packages/webview_flutter/tizen/src/ewk_internal_api_binding.h
@@ -36,6 +36,10 @@ typedef void (*EwkViewOffscreenRenderingEnabledSetFnPtr)(Evas_Object* obj,
 typedef void (*EwkViewImeWindowSetFnPtr)(Evas_Object* obj, void* window);
 typedef Eina_Bool (*EwkViewKeyEventsEnabledSetFnPtr)(Evas_Object* obj,
                                                      Eina_Bool enabled);
+typedef Eina_Bool (*EwkViewSupportVideoHoleSetFnPtr)(Evas_Object* obj,
+                                                     void* window,
+                                                     Eina_Bool enabled,
+                                                     Eina_Bool boo);
 
 typedef struct {
   EwkViewBgColorSetFnPtr SetBackgroundColor = nullptr;
@@ -45,6 +49,7 @@ typedef struct {
       nullptr;
   EwkViewImeWindowSetFnPtr ImeWindowSet = nullptr;
   EwkViewKeyEventsEnabledSetFnPtr KeyEventsEnabledSet = nullptr;
+  EwkViewSupportVideoHoleSetFnPtr SupportVideoHoleSet = nullptr;
 } EwkViewProcTable;
 
 typedef void (*EwkSetArgumentsFnPtr)(int argc, char** argv);
diff --git a/packages/webview_flutter/tizen/src/webview.cc b/packages/webview_flutter/tizen/src/webview.cc
index abd15aa13..8fe79c97b 100644
--- a/packages/webview_flutter/tizen/src/webview.cc
+++ b/packages/webview_flutter/tizen/src/webview.cc
@@ -10,8 +10,6 @@
 #include <flutter_texture_registrar.h>
 #include <tbm_surface.h>
 
-#include <ostream>
-
 #include "buffer_pool.h"
 #include "ewk_internal_api_binding.h"
 #include "log.h"
@@ -22,9 +20,29 @@ namespace {
 constexpr size_t kBufferPoolSize = 5;
 constexpr char kEwkInstance[] = "ewk_instance";
 constexpr char kTizenWebViewChannelName[] = "plugins.flutter.io/tizen_webview_";
+constexpr char kTizenWebViewControllerChannelName[] =
+    "plugins.flutter.io/tizen_webview_controller_";
 constexpr char kTizenNavigationDelegateChannelName[] =
     "plugins.flutter.io/tizen_webview_navigation_delegate_";
 
+std::string ConvertLogLevelToString(Ewk_Console_Message_Level level) {
+  switch (level) {
+    case EWK_CONSOLE_MESSAGE_LEVEL_NULL:
+    case EWK_CONSOLE_MESSAGE_LEVEL_LOG:
+      return "log";
+    case EWK_CONSOLE_MESSAGE_LEVEL_WARNING:
+      return "warning";
+    case EWK_CONSOLE_MESSAGE_LEVEL_ERROR:
+      return "error";
+    case EWK_CONSOLE_MESSAGE_LEVEL_DEBUG:
+      return "debug";
+    case EWK_CONSOLE_MESSAGE_LEVEL_INFO:
+      return "info";
+    default:
+      return "log";
+  }
+}
+
 class NavigationRequestResult : public FlMethodResult {
  public:
   NavigationRequestResult(WebView* webview) : webview_(webview) {}
@@ -108,6 +126,10 @@ WebView::WebView(flutter::PluginRegistrar* registrar, int view_id,
         webview->HandleWebViewMethodCall(call, std::move(result));
       });
 
+  webview_controller_channel_ = std::make_unique<FlMethodChannel>(
+      GetPluginRegistrar()->messenger(), GetWebViewControllerChannelName(),
+      &flutter::StandardMethodCodec::GetInstance());
+
   navigation_delegate_channel_ = std::make_unique<FlMethodChannel>(
       GetPluginRegistrar()->messenger(), GetNavigationDelegateChannelName(),
       &flutter::StandardMethodCodec::GetInstance());
@@ -140,6 +162,11 @@ std::string WebView::GetWebViewChannelName() {
   return std::string(kTizenWebViewChannelName) + std::to_string(GetViewId());
 }
 
+std::string WebView::GetWebViewControllerChannelName() {
+  return std::string(kTizenWebViewControllerChannelName) +
+         std::to_string(GetViewId());
+}
+
 std::string WebView::GetNavigationDelegateChannelName() {
   return std::string(kTizenNavigationDelegateChannelName) +
          std::to_string(GetViewId());
@@ -171,6 +198,14 @@ void WebView::Dispose() {
   }
 }
 
+void WebView::Offset(double left, double top) {
+  left_ = left;
+  top_ = top;
+
+  evas_object_move(webview_instance_, static_cast<int>(left_),
+                   static_cast<int>(top_));
+}
+
 void WebView::Resize(double width, double height) {
   width_ = width;
   height_ = height;
@@ -203,8 +238,8 @@ void WebView::Touch(int type, int button, double x, double y, double dx,
   Eina_List* points = 0;
   Ewk_Touch_Point* point = new Ewk_Touch_Point;
   point->id = 0;
-  point->x = x;
-  point->y = y;
+  point->x = x + left_;
+  point->y = y + top_;
   point->state = state;
   points = eina_list_append(points, point);
 
@@ -285,6 +320,11 @@ void WebView::InitWebView() {
   EwkInternalApiBinding::GetInstance().view.KeyEventsEnabledSet(
       webview_instance_, true);
 
+#ifdef TV_PROFILE
+  EwkInternalApiBinding::GetInstance().view.SupportVideoHoleSet(
+      webview_instance_, window_, true, false);
+#endif
+
   evas_object_smart_callback_add(webview_instance_, "offscreen,frame,rendered",
                                  &WebView::OnFrameRendered, this);
   evas_object_smart_callback_add(webview_instance_, "load,started",
@@ -506,12 +546,15 @@ void WebView::HandleWebViewMethodCall(const FlMethodCall& method_call,
           *color & 0xff, *color >> 24 & 0xff);
       result->Success();
     }
-  } else if (method_name == "userAgent") {
+  } else if (method_name == "setUserAgent") {
     const auto* userAgent = std::get_if<std::string>(arguments);
     if (userAgent) {
       ewk_view_user_agent_set(webview_instance_, userAgent->c_str());
     }
     result->Success();
+  } else if (method_name == "getUserAgent") {
+    result->Success(flutter::EncodableValue(
+        std::string(ewk_view_user_agent_get(webview_instance_))));
   } else {
     result->NotImplemented();
   }
@@ -631,19 +674,18 @@ void WebView::OnConsoleMessage(void* data, Evas_Object* obj, void* event_info) {
   Ewk_Console_Message* message = static_cast<Ewk_Console_Message*>(event_info);
   Ewk_Console_Message_Level log_level =
       EwkInternalApiBinding::GetInstance().console_message.LevelGet(message);
-  std::string source =
-      EwkInternalApiBinding::GetInstance().console_message.SourceGet(message);
-  int32_t line =
-      EwkInternalApiBinding::GetInstance().console_message.LineGet(message);
   std::string text =
       EwkInternalApiBinding::GetInstance().console_message.TextGet(message);
-  std::ostream& stream =
-      log_level == EWK_CONSOLE_MESSAGE_LEVEL_ERROR ? std::cerr : std::cout;
-  stream << "WebView: ";
-  if (!source.empty() && line > 0) {
-    stream << source << "(" << line << ") > ";
+  WebView* webview = static_cast<WebView*>(data);
+  if (webview->webview_controller_channel_) {
+    flutter::EncodableMap args = {
+        {flutter::EncodableValue("level"),
+         flutter::EncodableValue(ConvertLogLevelToString(log_level))},
+        {flutter::EncodableValue("message"), flutter::EncodableValue(text)},
+    };
+    webview->webview_controller_channel_->InvokeMethod(
+        "onConsoleMessage", std::make_unique<flutter::EncodableValue>(args));
   }
-  stream << text << std::endl;
 }
 
 void WebView::OnNavigationPolicy(void* data, Evas_Object* obj,
diff --git a/packages/webview_flutter/tizen/src/webview.h b/packages/webview_flutter/tizen/src/webview.h
index a3eb8ebc8..76eaa25bc 100644
--- a/packages/webview_flutter/tizen/src/webview.h
+++ b/packages/webview_flutter/tizen/src/webview.h
@@ -35,6 +35,7 @@ class WebView : public PlatformView {
 
   virtual void Dispose() override;
 
+  virtual void Offset(double left, double top) override;
   virtual void Resize(double width, double height) override;
   virtual void Touch(int type, int button, double x, double y, double dx,
                      double dy) override;
@@ -63,6 +64,7 @@ class WebView : public PlatformView {
 
   void RegisterJavaScriptChannelName(const std::string& name);
   std::string GetWebViewChannelName();
+  std::string GetWebViewControllerChannelName();
   std::string GetNavigationDelegateChannelName();
 
   void InitWebView();
@@ -84,12 +86,15 @@ class WebView : public PlatformView {
   flutter::TextureRegistrar* texture_registrar_;
   double width_ = 0.0;
   double height_ = 0.0;
+  double left_ = 0.0;
+  double top_ = 0.0;
   void* window_ = nullptr;
   BufferUnit* working_surface_ = nullptr;
   BufferUnit* candidate_surface_ = nullptr;
   BufferUnit* rendered_surface_ = nullptr;
   bool has_navigation_delegate_ = false;
   std::unique_ptr<FlMethodChannel> webview_channel_;
+  std::unique_ptr<FlMethodChannel> webview_controller_channel_;
   std::unique_ptr<FlMethodChannel> navigation_delegate_channel_;
   std::unique_ptr<flutter::TextureVariant> texture_variant_;
   std::mutex mutex_;