diff --git a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFScriptMessageHandlerHostApiTests.m b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFScriptMessageHandlerHostApiTests.m
index 5a51e7b980f8..84d31d1c543e 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFScriptMessageHandlerHostApiTests.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFScriptMessageHandlerHostApiTests.m
@@ -45,8 +45,9 @@ - (id)mockFlutterApiWithManager:(FWFInstanceManager *)instanceManager {
 
 - (void)testCreateWithIdentifier {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
-  FWFScriptMessageHandlerHostApiImpl *hostAPI =
-      [[FWFScriptMessageHandlerHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFScriptMessageHandlerHostApiImpl *hostAPI = [[FWFScriptMessageHandlerHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI createWithIdentifier:@0 error:&error];
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFUIDelegateHostApiTests.m b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFUIDelegateHostApiTests.m
index eec7a2b5a6dc..939c14873fa4 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFUIDelegateHostApiTests.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFUIDelegateHostApiTests.m
@@ -45,8 +45,9 @@ - (id)mockFlutterApiWithManager:(FWFInstanceManager *)instanceManager {
 
 - (void)testCreateWithIdentifier {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
-  FWFUIDelegateHostApiImpl *hostAPI =
-      [[FWFUIDelegateHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFUIDelegateHostApiImpl *hostAPI = [[FWFUIDelegateHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI createWithIdentifier:@0 error:&error];
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewConfigurationHostApiTests.m b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewConfigurationHostApiTests.m
index e09e16b62e45..2ec74d0522dd 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewConfigurationHostApiTests.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewConfigurationHostApiTests.m
@@ -14,8 +14,9 @@ @interface FWFWebViewConfigurationHostApiTests : XCTestCase
 @implementation FWFWebViewConfigurationHostApiTests
 - (void)testCreateWithIdentifier {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
-  FWFWebViewConfigurationHostApiImpl *hostAPI =
-      [[FWFWebViewConfigurationHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewConfigurationHostApiImpl *hostAPI = [[FWFWebViewConfigurationHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI createWithIdentifier:@0 error:&error];
@@ -27,8 +28,9 @@ - (void)testCreateWithIdentifier {
 
 - (void)testCreateFromWebViewWithIdentifier {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
-  FWFWebViewConfigurationHostApiImpl *hostAPI =
-      [[FWFWebViewConfigurationHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewConfigurationHostApiImpl *hostAPI = [[FWFWebViewConfigurationHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   WKWebView *mockWebView = OCMClassMock([WKWebView class]);
   OCMStub([mockWebView configuration]).andReturn(OCMClassMock([WKWebViewConfiguration class]));
@@ -48,8 +50,9 @@ - (void)testSetAllowsInlineMediaPlayback {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebViewConfiguration withIdentifier:0];
 
-  FWFWebViewConfigurationHostApiImpl *hostAPI =
-      [[FWFWebViewConfigurationHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewConfigurationHostApiImpl *hostAPI = [[FWFWebViewConfigurationHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI setAllowsInlineMediaPlaybackForConfigurationWithIdentifier:@0
@@ -65,8 +68,9 @@ - (void)testSetMediaTypesRequiringUserActionForPlayback {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebViewConfiguration withIdentifier:0];
 
-  FWFWebViewConfigurationHostApiImpl *hostAPI =
-      [[FWFWebViewConfigurationHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewConfigurationHostApiImpl *hostAPI = [[FWFWebViewConfigurationHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewHostApiTests.m b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewHostApiTests.m
index ca17cc212d31..1061abb78f45 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewHostApiTests.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/example/ios/RunnerTests/FWFWebViewHostApiTests.m
@@ -14,8 +14,9 @@ @interface FWFWebViewHostApiTests : XCTestCase
 @implementation FWFWebViewHostApiTests
 - (void)testCreateWithIdentifier {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   [instanceManager addDartCreatedInstance:[[WKWebViewConfiguration alloc] init] withIdentifier:0];
 
@@ -32,8 +33,9 @@ - (void)testLoadRequest {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   FWFNSUrlRequestData *requestData = [FWFNSUrlRequestData makeWithUrl:@"https://www.flutter.dev"
@@ -57,8 +59,9 @@ - (void)testLoadRequestWithInvalidUrl {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   FWFNSUrlRequestData *requestData = [FWFNSUrlRequestData makeWithUrl:@"%invalidUrl%"
@@ -78,8 +81,9 @@ - (void)testSetCustomUserAgent {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI setUserAgentForWebViewWithIdentifier:@0 userAgent:@"userA" error:&error];
@@ -94,8 +98,9 @@ - (void)testURL {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   XCTAssertEqualObjects([hostAPI URLForWebViewWithIdentifier:@0 error:&error],
@@ -110,8 +115,9 @@ - (void)testCanGoBack {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   XCTAssertEqualObjects([hostAPI canGoBackForWebViewWithIdentifier:@0 error:&error], @YES);
@@ -124,8 +130,9 @@ - (void)testSetUIDelegate {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   id<WKUIDelegate> mockDelegate = OCMProtocolMock(@protocol(WKUIDelegate));
   [instanceManager addDartCreatedInstance:mockDelegate withIdentifier:1];
@@ -142,8 +149,9 @@ - (void)testSetNavigationDelegate {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   id<WKNavigationDelegate> mockDelegate = OCMProtocolMock(@protocol(WKNavigationDelegate));
   [instanceManager addDartCreatedInstance:mockDelegate withIdentifier:1];
@@ -161,8 +169,9 @@ - (void)testEstimatedProgress {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   XCTAssertEqualObjects([hostAPI estimatedProgressForWebViewWithIdentifier:@0 error:&error], @34.0);
@@ -175,8 +184,9 @@ - (void)testloadHTMLString {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI loadHTMLForWebViewWithIdentifier:@0
@@ -193,8 +203,9 @@ - (void)testLoadFileURL {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI loadFileForWebViewWithIdentifier:@0
@@ -222,10 +233,11 @@ - (void)testLoadFlutterAsset {
   OCMStub([mockBundle URLForResource:@"myFolder/assets/index" withExtension:@"html"])
       .andReturn([NSURL URLWithString:@"webview_flutter/myFolder/assets/index.html"]);
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager
-                                                      bundle:mockBundle
-                                                assetManager:mockAssetManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager
+                       bundle:mockBundle
+                 assetManager:mockAssetManager];
 
   FlutterError *error;
   [hostAPI loadAssetForWebViewWithIdentifier:@0 assetKey:@"assets/index.html" error:&error];
@@ -243,8 +255,9 @@ - (void)testCanGoForward {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   XCTAssertEqualObjects([hostAPI canGoForwardForWebViewWithIdentifier:@0 error:&error], @NO);
@@ -257,8 +270,9 @@ - (void)testGoBack {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI goBackForWebViewWithIdentifier:@0 error:&error];
@@ -272,8 +286,9 @@ - (void)testGoForward {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI goForwardForWebViewWithIdentifier:@0 error:&error];
@@ -287,8 +302,9 @@ - (void)testReload {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI reloadWebViewWithIdentifier:@0 error:&error];
@@ -303,8 +319,9 @@ - (void)testTitle {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   XCTAssertEqualObjects([hostAPI titleForWebViewWithIdentifier:@0 error:&error], @"myTitle");
@@ -317,8 +334,9 @@ - (void)testSetAllowsBackForwardNavigationGestures {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   FlutterError *error;
   [hostAPI setAllowsBackForwardForWebViewWithIdentifier:@0 isAllowed:@YES error:&error];
@@ -336,8 +354,9 @@ - (void)testEvaluateJavaScript {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   NSString __block *returnValue;
   FlutterError __block *returnError;
@@ -369,8 +388,9 @@ - (void)testEvaluateJavaScriptReturnsNSErrorData {
   FWFInstanceManager *instanceManager = [[FWFInstanceManager alloc] init];
   [instanceManager addDartCreatedInstance:mockWebView withIdentifier:0];
 
-  FWFWebViewHostApiImpl *hostAPI =
-      [[FWFWebViewHostApiImpl alloc] initWithInstanceManager:instanceManager];
+  FWFWebViewHostApiImpl *hostAPI = [[FWFWebViewHostApiImpl alloc]
+      initWithBinaryMessenger:OCMProtocolMock(@protocol(FlutterBinaryMessenger))
+              instanceManager:instanceManager];
 
   NSString __block *returnValue;
   FlutterError __block *returnError;
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFHTTPCookieStoreHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFHTTPCookieStoreHostApi.m
index 3ad0a169b81f..79a3a684b805 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFHTTPCookieStoreHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFHTTPCookieStoreHostApi.m
@@ -7,7 +7,8 @@
 #import "FWFWebsiteDataStoreHostApi.h"
 
 @interface FWFHTTPCookieStoreHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFHTTPCookieStoreHostApiImpl
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.h b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.h
index da5939a3abed..90e55417cd1b 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.h
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.h
@@ -27,6 +27,7 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @interface FWFNavigationDelegate : FWFObject <WKNavigationDelegate>
 @property(readonly, nonnull, nonatomic) FWFNavigationDelegateFlutterApiImpl *navigationDelegateAPI;
+
 - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
                         instanceManager:(FWFInstanceManager *)instanceManager;
 @end
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.m
index 6946783088d5..1132e02880b2 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFNavigationDelegateHostApi.m
@@ -7,7 +7,7 @@
 #import "FWFWebViewConfigurationHostApi.h"
 
 @interface FWFNavigationDelegateFlutterApiImpl ()
-// This reference must be weak to prevent a circular reference with the objects it stores.
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
@@ -183,8 +183,10 @@ - (void)webViewWebContentProcessDidTerminate:(WKWebView *)webView {
 @end
 
 @interface FWFNavigationDelegateHostApiImpl ()
-@property(weak) id<FlutterBinaryMessenger> binaryMessenger;
-// This reference must be weak to prevent a circular reference with the objects it stores.
+// BinaryMessenger must be weak to prevent a circular reference with the host API it
+// references.
+@property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.h b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.h
index 1f7b2943974e..0b740a524cef 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.h
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.h
@@ -17,6 +17,12 @@ NS_ASSUME_NONNULL_BEGIN
 @interface FWFObjectFlutterApiImpl : FWFNSObjectFlutterApi
 - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
                         instanceManager:(FWFInstanceManager *)instanceManager;
+
+- (void)observeValueForObject:(NSObject *)instance
+                      keyPath:(NSString *)keyPath
+                       object:(NSObject *)object
+                       change:(NSDictionary<NSKeyValueChangeKey, id> *)change
+                   completion:(void (^)(NSError *_Nullable))completion;
 @end
 
 /**
@@ -24,6 +30,7 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @interface FWFObject : NSObject
 @property(readonly, nonnull, nonatomic) FWFObjectFlutterApiImpl *objectApi;
+
 - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
                         instanceManager:(FWFInstanceManager *)instanceManager;
 @end
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.m
index f88b91750493..c88b2f4e56cb 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFObjectHostApi.m
@@ -6,7 +6,7 @@
 #import "FWFDataConverters.h"
 
 @interface FWFObjectFlutterApiImpl ()
-// This reference must be weak to prevent a circular reference with the objects it stores.
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
@@ -74,7 +74,7 @@ - (void)observeValueForKeyPath:(NSString *)keyPath
 @end
 
 @interface FWFObjectHostApiImpl ()
-// This reference must be weak to prevent a circular reference with the objects it stores.
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFPreferencesHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFPreferencesHostApi.m
index dbb04fccccd2..1a10c08eec4a 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFPreferencesHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFPreferencesHostApi.m
@@ -6,7 +6,8 @@
 #import "FWFWebViewConfigurationHostApi.h"
 
 @interface FWFPreferencesHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFPreferencesHostApiImpl
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.h b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.h
index 36f12feac3fe..9c5769e4658b 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.h
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.h
@@ -27,6 +27,7 @@ NS_ASSUME_NONNULL_BEGIN
 @interface FWFScriptMessageHandler : FWFObject <WKScriptMessageHandler>
 @property(readonly, nonnull, nonatomic)
     FWFScriptMessageHandlerFlutterApiImpl *scriptMessageHandlerAPI;
+
 - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
                         instanceManager:(FWFInstanceManager *)instanceManager;
 @end
@@ -37,7 +38,8 @@ NS_ASSUME_NONNULL_BEGIN
  * Handles creating WKScriptMessageHandler that intercommunicate with a paired Dart object.
  */
 @interface FWFScriptMessageHandlerHostApiImpl : NSObject <FWFWKScriptMessageHandlerHostApi>
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager;
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.m
index 69ace0202824..d9e8b934a79a 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScriptMessageHandlerHostApi.m
@@ -6,7 +6,7 @@
 #import "FWFDataConverters.h"
 
 @interface FWFScriptMessageHandlerFlutterApiImpl ()
-// This reference must be weak to prevent a circular reference with the objects it stores.
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
@@ -62,13 +62,19 @@ - (void)userContentController:(nonnull WKUserContentController *)userContentCont
 @end
 
 @interface FWFScriptMessageHandlerHostApiImpl ()
+// BinaryMessenger must be weak to prevent a circular reference with the host API it
+// references.
+@property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFScriptMessageHandlerHostApiImpl
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager {
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager {
   self = [self init];
   if (self) {
+    _binaryMessenger = binaryMessenger;
     _instanceManager = instanceManager;
   }
   return self;
@@ -81,7 +87,9 @@ - (FWFScriptMessageHandler *)scriptMessageHandlerForIdentifier:(NSNumber *)ident
 
 - (void)createWithIdentifier:(nonnull NSNumber *)identifier
                        error:(FlutterError *_Nullable *_Nonnull)error {
-  FWFScriptMessageHandler *scriptMessageHandler = [[FWFScriptMessageHandler alloc] init];
+  FWFScriptMessageHandler *scriptMessageHandler =
+      [[FWFScriptMessageHandler alloc] initWithBinaryMessenger:self.binaryMessenger
+                                               instanceManager:self.instanceManager];
   [self.instanceManager addDartCreatedInstance:scriptMessageHandler
                                 withIdentifier:identifier.longValue];
 }
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewHostApi.m
index fb77b717aa64..a32e9565b514 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFScrollViewHostApi.m
@@ -6,7 +6,8 @@
 #import "FWFWebViewHostApi.h"
 
 @interface FWFScrollViewHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFScrollViewHostApiImpl
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.h b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.h
index 1bb65914e097..7b6b4eec9b8e 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.h
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.h
@@ -20,6 +20,7 @@ NS_ASSUME_NONNULL_BEGIN
 @interface FWFUIDelegateFlutterApiImpl : FWFWKUIDelegateFlutterApi
 @property(readonly, nonatomic)
     FWFWebViewConfigurationFlutterApiImpl *webViewConfigurationFlutterApi;
+
 - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
                         instanceManager:(FWFInstanceManager *)instanceManager;
 @end
@@ -29,6 +30,7 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @interface FWFUIDelegate : FWFObject <WKUIDelegate>
 @property(readonly, nonnull, nonatomic) FWFUIDelegateFlutterApiImpl *UIDelegateAPI;
+
 - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
                         instanceManager:(FWFInstanceManager *)instanceManager;
 @end
@@ -39,7 +41,8 @@ NS_ASSUME_NONNULL_BEGIN
  * Handles creating WKUIDelegate that intercommunicate with a paired Dart object.
  */
 @interface FWFUIDelegateHostApiImpl : NSObject <FWFWKUIDelegateHostApi>
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager;
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.m
index 36c4b2feefe3..60e7ad11965c 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIDelegateHostApi.m
@@ -6,9 +6,10 @@
 #import "FWFDataConverters.h"
 
 @interface FWFUIDelegateFlutterApiImpl ()
-// BinaryMessenger and InstanceManager must be weak to prevent a circular reference
-// with the objects it stores.
+// BinaryMessenger must be weak to prevent a circular reference with the host API it
+// references.
 @property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
@@ -84,13 +85,19 @@ - (WKWebView *)webView:(WKWebView *)webView
 @end
 
 @interface FWFUIDelegateHostApiImpl ()
+// BinaryMessenger must be weak to prevent a circular reference with the host API it
+// references.
+@property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFUIDelegateHostApiImpl
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager {
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager {
   self = [self init];
   if (self) {
+    _binaryMessenger = binaryMessenger;
     _instanceManager = instanceManager;
   }
   return self;
@@ -102,7 +109,8 @@ - (FWFUIDelegate *)delegateForIdentifier:(NSNumber *)identifier {
 
 - (void)createWithIdentifier:(nonnull NSNumber *)identifier
                        error:(FlutterError *_Nullable *_Nonnull)error {
-  FWFUIDelegate *uIDelegate = [[FWFUIDelegate alloc] init];
+  FWFUIDelegate *uIDelegate = [[FWFUIDelegate alloc] initWithBinaryMessenger:self.binaryMessenger
+                                                             instanceManager:self.instanceManager];
   [self.instanceManager addDartCreatedInstance:uIDelegate withIdentifier:identifier.longValue];
 }
 @end
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIViewHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIViewHostApi.m
index 465738b570cd..a990561c4fba 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIViewHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUIViewHostApi.m
@@ -5,7 +5,8 @@
 #import "FWFUIViewHostApi.h"
 
 @interface FWFUIViewHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFUIViewHostApiImpl
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUserContentControllerHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUserContentControllerHostApi.m
index d15341a7883d..08bbaa68c99c 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUserContentControllerHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFUserContentControllerHostApi.m
@@ -7,7 +7,8 @@
 #import "FWFWebViewConfigurationHostApi.h"
 
 @interface FWFUserContentControllerHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFUserContentControllerHostApiImpl
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.h b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.h
index e2279b48c409..f1e62cc0cba3 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.h
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.h
@@ -7,6 +7,7 @@
 
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
+#import "FWFObjectHostApi.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -18,17 +19,29 @@ NS_ASSUME_NONNULL_BEGIN
 @interface FWFWebViewConfigurationFlutterApiImpl : FWFWKWebViewConfigurationFlutterApi
 - (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
                         instanceManager:(FWFInstanceManager *)instanceManager;
+
 - (void)createWithConfiguration:(WKWebViewConfiguration *)configuration
                      completion:(void (^)(NSError *_Nullable))completion;
 @end
 
+/**
+ * Implementation of WKWebViewConfiguration for FWFWebViewConfigurationHostApiImpl.
+ */
+@interface FWFWebViewConfiguration : WKWebViewConfiguration
+@property(readonly, nonnull, nonatomic) FWFObjectFlutterApiImpl *objectApi;
+
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager;
+@end
+
 /**
  * Host api implementation for WKWebViewConfiguration.
  *
  * Handles creating WKWebViewConfiguration that intercommunicate with a paired Dart object.
  */
 @interface FWFWebViewConfigurationHostApiImpl : NSObject <FWFWKWebViewConfigurationHostApi>
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager;
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.m
index 2b7d1be86d37..a083a2a031ef 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewConfigurationHostApi.m
@@ -7,8 +7,7 @@
 #import "FWFWebViewConfigurationHostApi.h"
 
 @interface FWFWebViewConfigurationFlutterApiImpl ()
-// BinaryMessenger and InstanceManager must be weak to prevent a circular reference
-// with the objects it stores.
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
 @property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
@@ -29,14 +28,45 @@ - (void)createWithConfiguration:(WKWebViewConfiguration *)configuration
 }
 @end
 
+@implementation FWFWebViewConfiguration
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager {
+  self = [self init];
+  if (self) {
+    _objectApi = [[FWFObjectFlutterApiImpl alloc] initWithBinaryMessenger:binaryMessenger
+                                                          instanceManager:instanceManager];
+  }
+  return self;
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary<NSKeyValueChangeKey, id> *)change
+                       context:(void *)context {
+  [self.objectApi observeValueForObject:self
+                                keyPath:keyPath
+                                 object:object
+                                 change:change
+                             completion:^(NSError *error) {
+                               NSAssert(!error, @"%@", error);
+                             }];
+}
+@end
+
 @interface FWFWebViewConfigurationHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// BinaryMessenger must be weak to prevent a circular reference with the host API it
+// references.
+@property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFWebViewConfigurationHostApiImpl
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager {
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager {
   self = [self init];
   if (self) {
+    _binaryMessenger = binaryMessenger;
     _instanceManager = instanceManager;
   }
   return self;
@@ -49,7 +79,9 @@ - (WKWebViewConfiguration *)webViewConfigurationForIdentifier:(NSNumber *)identi
 
 - (void)createWithIdentifier:(nonnull NSNumber *)identifier
                        error:(FlutterError *_Nullable *_Nonnull)error {
-  WKWebViewConfiguration *webViewConfiguration = [[WKWebViewConfiguration alloc] init];
+  FWFWebViewConfiguration *webViewConfiguration =
+      [[FWFWebViewConfiguration alloc] initWithBinaryMessenger:self.binaryMessenger
+                                               instanceManager:self.instanceManager];
   [self.instanceManager addDartCreatedInstance:webViewConfiguration
                                 withIdentifier:identifier.longValue];
 }
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.h b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.h
index 968a9a85b2e7..f1bb59bcb9ae 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.h
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.h
@@ -7,6 +7,7 @@
 
 #import "FWFGeneratedWebKitApis.h"
 #import "FWFInstanceManager.h"
+#import "FWFObjectHostApi.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -23,6 +24,12 @@ NS_ASSUME_NONNULL_BEGIN
  * Implementation of WKWebView that can be used as a FlutterPlatformView.
  */
 @interface FWFWebView : WKWebView <FlutterPlatformView>
+@property(readonly, nonnull, nonatomic) FWFObjectFlutterApiImpl *objectApi;
+
+- (instancetype)initWithFrame:(CGRect)frame
+                configuration:(nonnull WKWebViewConfiguration *)configuration
+              binaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+              instanceManager:(FWFInstanceManager *)instanceManager;
 @end
 
 /**
@@ -31,8 +38,11 @@ NS_ASSUME_NONNULL_BEGIN
  * Handles creating WKWebViews that intercommunicate with a paired Dart object.
  */
 @interface FWFWebViewHostApiImpl : NSObject <FWFWKWebViewHostApi>
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager;
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager;
+
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager
                                  bundle:(NSBundle *)bundle
                            assetManager:(FWFAssetManager *)assetManager;
 @end
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.m
index 2962aadd1647..9a8aedd1e646 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebViewHostApi.m
@@ -12,6 +12,18 @@ - (NSString *)lookupKeyForAsset:(NSString *)asset {
 @end
 
 @implementation FWFWebView
+- (instancetype)initWithFrame:(CGRect)frame
+                configuration:(nonnull WKWebViewConfiguration *)configuration
+              binaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+              instanceManager:(FWFInstanceManager *)instanceManager {
+  self = [self initWithFrame:frame configuration:configuration];
+  if (self) {
+    _objectApi = [[FWFObjectFlutterApiImpl alloc] initWithBinaryMessenger:binaryMessenger
+                                                          instanceManager:instanceManager];
+  }
+  return self;
+}
+
 - (void)setFrame:(CGRect)frame {
   [super setFrame:frame];
   // Prevents the contentInsets from being adjusted by iOS and gives control to Flutter.
@@ -28,29 +40,50 @@ - (void)setFrame:(CGRect)frame {
   }
 }
 
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary<NSKeyValueChangeKey, id> *)change
+                       context:(void *)context {
+  [self.objectApi observeValueForObject:self
+                                keyPath:keyPath
+                                 object:object
+                                 change:change
+                             completion:^(NSError *error) {
+                               NSAssert(!error, @"%@", error);
+                             }];
+}
+
 - (nonnull UIView *)view {
   return self;
 }
 @end
 
 @interface FWFWebViewHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// BinaryMessenger must be weak to prevent a circular reference with the host API it
+// references.
+@property(nonatomic, weak) id<FlutterBinaryMessenger> binaryMessenger;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @property NSBundle *bundle;
 @property FWFAssetManager *assetManager;
 @end
 
 @implementation FWFWebViewHostApiImpl
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager {
-  return [self initWithInstanceManager:instanceManager
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager {
+  return [self initWithBinaryMessenger:binaryMessenger
+                       instanceManager:instanceManager
                                 bundle:[NSBundle mainBundle]
                           assetManager:[[FWFAssetManager alloc] init]];
 }
 
-- (instancetype)initWithInstanceManager:(FWFInstanceManager *)instanceManager
+- (instancetype)initWithBinaryMessenger:(id<FlutterBinaryMessenger>)binaryMessenger
+                        instanceManager:(FWFInstanceManager *)instanceManager
                                  bundle:(NSBundle *)bundle
                            assetManager:(FWFAssetManager *)assetManager {
   self = [self init];
   if (self) {
+    _binaryMessenger = binaryMessenger;
     _instanceManager = instanceManager;
     _bundle = bundle;
     _assetManager = assetManager;
@@ -77,7 +110,9 @@ - (void)createWithIdentifier:(nonnull NSNumber *)identifier
   WKWebViewConfiguration *configuration = (WKWebViewConfiguration *)[self.instanceManager
       instanceForIdentifier:configurationIdentifier.longValue];
   FWFWebView *webView = [[FWFWebView alloc] initWithFrame:CGRectMake(0, 0, 0, 0)
-                                            configuration:configuration];
+                                            configuration:configuration
+                                          binaryMessenger:self.binaryMessenger
+                                          instanceManager:self.instanceManager];
   [self.instanceManager addDartCreatedInstance:webView withIdentifier:identifier.longValue];
 }
 
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebsiteDataStoreHostApi.m b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebsiteDataStoreHostApi.m
index 0fd85e010a0a..5398d14d4e8b 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebsiteDataStoreHostApi.m
+++ b/packages/webview_flutter/webview_flutter_wkwebview/ios/Classes/FWFWebsiteDataStoreHostApi.m
@@ -7,7 +7,8 @@
 #import "FWFWebViewConfigurationHostApi.h"
 
 @interface FWFWebsiteDataStoreHostApiImpl ()
-@property(nonatomic) FWFInstanceManager *instanceManager;
+// InstanceManager must be weak to prevent a circular reference with the object it stores.
+@property(nonatomic, weak) FWFInstanceManager *instanceManager;
 @end
 
 @implementation FWFWebsiteDataStoreHostApiImpl
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/common/instance_manager.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/common/instance_manager.dart
index c9c8c2324cc6..3cc100aebd46 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/common/instance_manager.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/common/instance_manager.dart
@@ -179,8 +179,6 @@ class InstanceManager {
     final Copyable copy = instance.copy();
     _identifiers[copy] = identifier;
     _strongInstances[identifier] = copy;
-
-    assert(instance == copy);
   }
 
   /// Whether this manager contains the given [identifier].
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation.dart
index 0a1dd347f8a2..f537a4454c4f 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation.dart
@@ -237,13 +237,12 @@ class NSHttpCookie {
 /// The root class of most Objective-C class hierarchies.
 @immutable
 class NSObject with Copyable {
-  // TODO(bparrishMines): Change constructor name to `detached`.
   /// Constructs a [NSObject] without creating the associated
   /// Objective-C object.
   ///
   /// This should only be used by subclasses created by this library or to
   /// create copies.
-  NSObject({
+  NSObject.detached({
     this.observeValue,
     BinaryMessenger? binaryMessenger,
     InstanceManager? instanceManager,
@@ -255,6 +254,11 @@ class NSObject with Copyable {
     FoundationFlutterApis.instance.ensureSetUp();
   }
 
+  /// Release the reference to the Objective-C object.
+  static void dispose(NSObject instance) {
+    instance._api.instanceManager.removeWeakReference(instance);
+  }
+
   /// Global instance of [InstanceManager].
   static final InstanceManager globalInstanceManager =
       InstanceManager(onWeakReferenceRemoved: (int instanceId) {
@@ -290,30 +294,12 @@ class NSObject with Copyable {
     return _api.removeObserverForInstances(this, observer, keyPath);
   }
 
-  /// Release the reference to the Objective-C object.
-  static void dispose(NSObject instance) {
-    instance._api.instanceManager.removeWeakReference(instance);
-  }
-
   @override
-  Copyable copy() {
-    return NSObject(
+  NSObject copy() {
+    return NSObject.detached(
       observeValue: observeValue,
       binaryMessenger: _api.binaryMessenger,
       instanceManager: _api.instanceManager,
     );
   }
-
-  @override
-  int get hashCode {
-    return Object.hash(_api, _api.instanceManager.getIdentifier(this));
-  }
-
-  @override
-  bool operator ==(Object other) {
-    return other is NSObject &&
-        _api == other._api &&
-        _api.instanceManager.getIdentifier(this) ==
-            other._api.instanceManager.getIdentifier(other);
-  }
 }
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation_api_impls.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation_api_impls.dart
index de760ec5b36e..d2310e0a5df8 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation_api_impls.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation_api_impls.dart
@@ -89,7 +89,6 @@ class FoundationFlutterApis {
 }
 
 /// Host api implementation for [NSObject].
-@immutable
 class NSObjectHostApiImpl extends NSObjectHostApi {
   /// Constructs an [NSObjectHostApiImpl].
   NSObjectHostApiImpl({
@@ -134,18 +133,6 @@ class NSObjectHostApiImpl extends NSObjectHostApi {
       keyPath,
     );
   }
-
-  @override
-  int get hashCode {
-    return Object.hash(binaryMessenger, instanceManager);
-  }
-
-  @override
-  bool operator ==(Object other) {
-    return other is NSObjectHostApiImpl &&
-        binaryMessenger == other.binaryMessenger &&
-        instanceManager == other.instanceManager;
-  }
 }
 
 /// Flutter api implementation for [NSObject].
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit.dart
index 88aefc18e454..33447091e5f9 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit.dart
@@ -4,6 +4,7 @@
 
 import 'dart:math';
 
+import 'package:flutter/foundation.dart';
 // TODO(a14n): remove this import once Flutter 3.1 or later reaches stable (including flutter/flutter#106316)
 // ignore: unnecessary_import
 import 'package:flutter/painting.dart' show Color;
@@ -14,25 +15,42 @@ import '../foundation/foundation.dart';
 import '../web_kit/web_kit.dart';
 import 'ui_kit_api_impls.dart';
 
-// TODO(bparrishMines): All subclasses of NSObject need to pass their
-// InstanceManager and BinaryMessenger to its parent. They also need to
-// override copy();
-
 /// A view that allows the scrolling and zooming of its contained views.
 ///
 /// Wraps [UIScrollView](https://developer.apple.com/documentation/uikit/uiscrollview?language=objc).
+@immutable
 class UIScrollView extends UIView {
   /// Constructs a [UIScrollView] that is owned by [webView].
-  UIScrollView.fromWebView(
+  factory UIScrollView.fromWebView(
     WKWebView webView, {
     BinaryMessenger? binaryMessenger,
     InstanceManager? instanceManager,
-  }) : _scrollViewApi = UIScrollViewHostApiImpl(
+  }) {
+    final UIScrollView scrollView = UIScrollView.detached(
+      binaryMessenger: binaryMessenger,
+      instanceManager: instanceManager,
+    );
+    scrollView._scrollViewApi.createFromWebViewForInstances(
+      scrollView,
+      webView,
+    );
+    return scrollView;
+  }
+
+  /// Constructs a [UIScrollView] without creating the associated
+  /// Objective-C object.
+  ///
+  /// This should only be used by subclasses created by this library or to
+  /// create copies.
+  UIScrollView.detached({
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _scrollViewApi = UIScrollViewHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        ) {
-    _scrollViewApi.createFromWebViewForInstances(this, webView);
-  }
+        ),
+        super.detached();
 
   final UIScrollViewHostApiImpl _scrollViewApi;
 
@@ -59,21 +77,36 @@ class UIScrollView extends UIView {
   Future<void> setContentOffset(Point<double> offset) {
     return _scrollViewApi.setContentOffsetForInstances(this, offset);
   }
+
+  @override
+  UIScrollView copy() {
+    return UIScrollView.detached(
+      observeValue: observeValue,
+      binaryMessenger: _viewApi.binaryMessenger,
+      instanceManager: _viewApi.instanceManager,
+    );
+  }
 }
 
 /// Manages the content for a rectangular area on the screen.
 ///
 /// Wraps [UIView](https://developer.apple.com/documentation/uikit/uiview?language=objc).
+@immutable
 class UIView extends NSObject {
-  /// Constructs an [NSObject].
-  UIView({
+  /// Constructs a [UIView] without creating the associated
+  /// Objective-C object.
+  ///
+  /// This should only be used by subclasses created by this library or to
+  /// create copies.
+  UIView.detached({
     super.observeValue,
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  }) : _viewApi = UIViewHostApiImpl(
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _viewApi = UIViewHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        );
+        ),
+        super.detached();
 
   final UIViewHostApiImpl _viewApi;
 
@@ -92,4 +125,13 @@ class UIView extends NSObject {
   Future<void> setOpaque(bool opaque) {
     return _viewApi.setOpaqueForInstances(this, opaque);
   }
+
+  @override
+  UIView copy() {
+    return UIView.detached(
+      observeValue: observeValue,
+      binaryMessenger: _viewApi.binaryMessenger,
+      instanceManager: _viewApi.instanceManager,
+    );
+  }
 }
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit_api_impls.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit_api_impls.dart
index e921c4bad15a..6a54166fbad8 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit_api_impls.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit_api_impls.dart
@@ -6,6 +6,7 @@ import 'dart:async';
 import 'dart:math';
 
 import 'package:flutter/painting.dart' show Color;
+import 'package:flutter/services.dart';
 
 import 'package:webview_flutter_wkwebview/src/foundation/foundation.dart';
 
@@ -18,9 +19,16 @@ import 'ui_kit.dart';
 class UIScrollViewHostApiImpl extends UIScrollViewHostApi {
   /// Constructs a [UIScrollViewHostApiImpl].
   UIScrollViewHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -75,9 +83,16 @@ class UIScrollViewHostApiImpl extends UIScrollViewHostApi {
 class UIViewHostApiImpl extends UIViewHostApi {
   /// Constructs a [UIViewHostApiImpl].
   UIViewHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit.dart
index b2945293e624..ffc6eb8c23bf 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit.dart
@@ -10,10 +10,6 @@ import '../foundation/foundation.dart';
 import '../ui_kit/ui_kit.dart';
 import 'web_kit_api_impls.dart';
 
-// TODO(bparrishMines): All subclasses of NSObject need to pass their
-// InstanceManager and BinaryMessenger to its parent. They also need to
-// override copy(): https://github.com/flutter/flutter/issues/105245
-
 /// Times at which to inject script content into a webpage.
 ///
 /// Wraps [WKUserScriptInjectionTime](https://developer.apple.com/documentation/webkit/wkuserscriptinjectiontime?language=objc).
@@ -214,23 +210,40 @@ class WKScriptMessage {
 /// Encapsulates the standard behaviors to apply to websites.
 ///
 /// Wraps [WKPreferences](https://developer.apple.com/documentation/webkit/wkpreferences?language=objc).
+@immutable
 class WKPreferences extends NSObject {
   /// Constructs a [WKPreferences] that is owned by [configuration].
-  @visibleForTesting
-  WKPreferences.fromWebViewConfiguration(
+  factory WKPreferences.fromWebViewConfiguration(
     WKWebViewConfiguration configuration, {
     BinaryMessenger? binaryMessenger,
     InstanceManager? instanceManager,
-  }) : _preferencesApi = WKPreferencesHostApiImpl(
-          binaryMessenger: binaryMessenger,
-          instanceManager: instanceManager,
-        ) {
-    _preferencesApi.createFromWebViewConfigurationForInstances(
-      this,
+  }) {
+    final WKPreferences preferences = WKPreferences.detached(
+      binaryMessenger: binaryMessenger,
+      instanceManager: instanceManager,
+    );
+    preferences._preferencesApi.createFromWebViewConfigurationForInstances(
+      preferences,
       configuration,
     );
+    return preferences;
   }
 
+  /// Constructs a [WKPreferences] without creating the associated
+  /// Objective-C object.
+  ///
+  /// This should only be used by subclasses created by this library or to
+  /// create copies.
+  WKPreferences.detached({
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _preferencesApi = WKPreferencesHostApiImpl(
+          binaryMessenger: binaryMessenger,
+          instanceManager: instanceManager,
+        ),
+        super.detached();
+
   final WKPreferencesHostApiImpl _preferencesApi;
 
   // TODO(bparrishMines): Deprecated for iOS 14.0+. Add support for alternative.
@@ -240,22 +253,39 @@ class WKPreferences extends NSObject {
   Future<void> setJavaScriptEnabled(bool enabled) {
     return _preferencesApi.setJavaScriptEnabledForInstances(this, enabled);
   }
+
+  @override
+  WKPreferences copy() {
+    return WKPreferences.detached(
+      observeValue: observeValue,
+      binaryMessenger: _preferencesApi.binaryMessenger,
+      instanceManager: _preferencesApi.instanceManager,
+    );
+  }
 }
 
 /// Manages cookies, disk and memory caches, and other types of data for a web view.
 ///
 /// Wraps [WKWebsiteDataStore](https://developer.apple.com/documentation/webkit/wkwebsitedatastore?language=objc).
+@immutable
 class WKWebsiteDataStore extends NSObject {
-  WKWebsiteDataStore._({
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  }) : _websiteDataStoreApi = WKWebsiteDataStoreHostApiImpl(
+  /// Constructs a [WKWebsiteDataStore] without creating the associated
+  /// Objective-C object.
+  ///
+  /// This should only be used by subclasses created by this library or to
+  /// create copies.
+  WKWebsiteDataStore.detached({
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _websiteDataStoreApi = WKWebsiteDataStoreHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        );
+        ),
+        super.detached();
 
   factory WKWebsiteDataStore._defaultDataStore() {
-    final WKWebsiteDataStore websiteDataStore = WKWebsiteDataStore._();
+    final WKWebsiteDataStore websiteDataStore = WKWebsiteDataStore.detached();
     websiteDataStore._websiteDataStoreApi.createDefaultDataStoreForInstances(
       websiteDataStore,
     );
@@ -263,13 +293,12 @@ class WKWebsiteDataStore extends NSObject {
   }
 
   /// Constructs a [WKWebsiteDataStore] that is owned by [configuration].
-  @visibleForTesting
   factory WKWebsiteDataStore.fromWebViewConfiguration(
     WKWebViewConfiguration configuration, {
     BinaryMessenger? binaryMessenger,
     InstanceManager? instanceManager,
   }) {
-    final WKWebsiteDataStore websiteDataStore = WKWebsiteDataStore._(
+    final WKWebsiteDataStore websiteDataStore = WKWebsiteDataStore.detached(
       binaryMessenger: binaryMessenger,
       instanceManager: instanceManager,
     );
@@ -304,28 +333,44 @@ class WKWebsiteDataStore extends NSObject {
       secondsModifiedSinceEpoch: since.millisecondsSinceEpoch / 1000,
     );
   }
+
+  @override
+  WKWebsiteDataStore copy() {
+    return WKWebsiteDataStore.detached(
+      observeValue: observeValue,
+      binaryMessenger: _websiteDataStoreApi.binaryMessenger,
+      instanceManager: _websiteDataStoreApi.instanceManager,
+    );
+  }
 }
 
 /// An object that manages the HTTP cookies associated with a particular web view.
 ///
 /// Wraps [WKHTTPCookieStore](https://developer.apple.com/documentation/webkit/wkhttpcookiestore?language=objc).
+@immutable
 class WKHttpCookieStore extends NSObject {
-  WKHttpCookieStore._({
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  }) : _httpCookieStoreApi = WKHttpCookieStoreHostApiImpl(
+  /// Constructs a [WKHttpCookieStore] without creating the associated
+  /// Objective-C object.
+  ///
+  /// This should only be used by subclasses created by this library or to
+  /// create copies.
+  WKHttpCookieStore.detached({
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _httpCookieStoreApi = WKHttpCookieStoreHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        );
+        ),
+        super.detached();
 
   /// Constructs a [WKHttpCookieStore] that is owned by [dataStore].
-  @visibleForTesting
   factory WKHttpCookieStore.fromWebsiteDataStore(
     WKWebsiteDataStore dataStore, {
     BinaryMessenger? binaryMessenger,
     InstanceManager? instanceManager,
   }) {
-    final WKHttpCookieStore cookieStore = WKHttpCookieStore._(
+    final WKHttpCookieStore cookieStore = WKHttpCookieStore.detached(
       binaryMessenger: binaryMessenger,
       instanceManager: instanceManager,
     );
@@ -342,25 +387,54 @@ class WKHttpCookieStore extends NSObject {
   Future<void> setCookie(NSHttpCookie cookie) {
     return _httpCookieStoreApi.setCookieForInsances(this, cookie);
   }
+
+  @override
+  WKHttpCookieStore copy() {
+    return WKHttpCookieStore.detached(
+      observeValue: observeValue,
+      binaryMessenger: _httpCookieStoreApi.binaryMessenger,
+      instanceManager: _httpCookieStoreApi.instanceManager,
+    );
+  }
 }
 
 /// An interface for receiving messages from JavaScript code running in a webpage.
 ///
-/// Wraps [WKScriptMessageHandler](https://developer.apple.com/documentation/webkit/wkscriptmessagehandler?language=objc)
+/// Wraps [WKScriptMessageHandler](https://developer.apple.com/documentation/webkit/wkscriptmessagehandler?language=objc).
+@immutable
 class WKScriptMessageHandler extends NSObject {
   /// Constructs a [WKScriptMessageHandler].
   WKScriptMessageHandler({
     required this.didReceiveScriptMessage,
     super.observeValue,
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  }) : _scriptMessageHandlerApi = WKScriptMessageHandlerHostApiImpl(
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _scriptMessageHandlerApi = WKScriptMessageHandlerHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        ) {
+        ),
+        super.detached() {
+    // Ensures FlutterApis for the WebKit library are set up.
+    WebKitFlutterApis.instance.ensureSetUp();
     _scriptMessageHandlerApi.createForInstances(this);
   }
 
+  /// Constructs a [WKScriptMessageHandler] without creating the associated
+  /// Objective-C object.
+  ///
+  /// This should only be used by subclasses created by this library or to
+  /// create copies.
+  WKScriptMessageHandler.detached({
+    required this.didReceiveScriptMessage,
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _scriptMessageHandlerApi = WKScriptMessageHandlerHostApiImpl(
+          binaryMessenger: binaryMessenger,
+          instanceManager: instanceManager,
+        ),
+        super.detached();
+
   final WKScriptMessageHandlerHostApiImpl _scriptMessageHandlerApi;
 
   /// Tells the handler that a webpage sent a script message.
@@ -372,6 +446,16 @@ class WKScriptMessageHandler extends NSObject {
     WKUserContentController userContentController,
     WKScriptMessage message,
   ) didReceiveScriptMessage;
+
+  @override
+  WKScriptMessageHandler copy() {
+    return WKScriptMessageHandler.detached(
+      didReceiveScriptMessage: didReceiveScriptMessage,
+      observeValue: observeValue,
+      binaryMessenger: _scriptMessageHandlerApi.binaryMessenger,
+      instanceManager: _scriptMessageHandlerApi.instanceManager,
+    );
+  }
 }
 
 /// Manages interactions between JavaScript code and your web view.
@@ -383,21 +467,25 @@ class WKScriptMessageHandler extends NSObject {
 ///   code.
 ///
 /// Wraps [WKUserContentController](https://developer.apple.com/documentation/webkit/wkusercontentcontroller?language=objc).
+@immutable
 class WKUserContentController extends NSObject {
   /// Constructs a [WKUserContentController] that is owned by [configuration].
-  @visibleForTesting
-  WKUserContentController.fromWebViewConfiguration(
+  factory WKUserContentController.fromWebViewConfiguration(
     WKWebViewConfiguration configuration, {
     BinaryMessenger? binaryMessenger,
     InstanceManager? instanceManager,
-  }) : _userContentControllerApi = WKUserContentControllerHostApiImpl(
-          binaryMessenger: binaryMessenger,
-          instanceManager: instanceManager,
-        ) {
-    _userContentControllerApi.createFromWebViewConfigurationForInstances(
-      this,
+  }) {
+    final WKUserContentController userContentController =
+        WKUserContentController.detached(
+      binaryMessenger: binaryMessenger,
+      instanceManager: instanceManager,
+    );
+    userContentController._userContentControllerApi
+        .createFromWebViewConfigurationForInstances(
+      userContentController,
       configuration,
     );
+    return userContentController;
   }
 
   /// Constructs a [WKUserContentController] without creating the associated
@@ -406,12 +494,14 @@ class WKUserContentController extends NSObject {
   /// This should only be used outside of tests by subclasses created by this
   /// library or to create a copy for an InstanceManager.
   WKUserContentController.detached({
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  }) : _userContentControllerApi = WKUserContentControllerHostApiImpl(
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _userContentControllerApi = WKUserContentControllerHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        );
+        ),
+        super.detached();
 
   final WKUserContentControllerHostApiImpl _userContentControllerApi;
 
@@ -474,24 +564,35 @@ class WKUserContentController extends NSObject {
   Future<void> removeAllUserScripts() {
     return _userContentControllerApi.removeAllUserScriptsForInstances(this);
   }
+
+  @override
+  WKUserContentController copy() {
+    return WKUserContentController.detached(
+      observeValue: observeValue,
+      binaryMessenger: _userContentControllerApi.binaryMessenger,
+      instanceManager: _userContentControllerApi.instanceManager,
+    );
+  }
 }
 
 /// A collection of properties that you use to initialize a web view.
 ///
 /// Wraps [WKWebViewConfiguration](https://developer.apple.com/documentation/webkit/wkwebviewconfiguration?language=objc).
+@immutable
 class WKWebViewConfiguration extends NSObject {
   /// Constructs a [WKWebViewConfiguration].
-  factory WKWebViewConfiguration({
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  }) {
-    final WKWebViewConfiguration configuration =
-        WKWebViewConfiguration.detached(
-      binaryMessenger: binaryMessenger,
-      instanceManager: instanceManager,
-    );
-    configuration._webViewConfigurationApi.createForInstances(configuration);
-    return configuration;
+  WKWebViewConfiguration({
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _webViewConfigurationApi = WKWebViewConfigurationHostApiImpl(
+          binaryMessenger: binaryMessenger,
+          instanceManager: instanceManager,
+        ),
+        super.detached() {
+    // Ensures FlutterApis for the WebKit library are set up.
+    WebKitFlutterApis.instance.ensureSetUp();
+    _webViewConfigurationApi.createForInstances(this);
   }
 
   /// A WKWebViewConfiguration that is owned by webView.
@@ -519,17 +620,14 @@ class WKWebViewConfiguration extends NSObject {
   /// This should only be used outside of tests by subclasses created by this
   /// library or to create a copy for an InstanceManager.
   WKWebViewConfiguration.detached({
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  })  : _binaryMessenger = binaryMessenger,
-        _instanceManager = instanceManager,
-        _webViewConfigurationApi = WKWebViewConfigurationHostApiImpl(
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _webViewConfigurationApi = WKWebViewConfigurationHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        );
-
-  final BinaryMessenger? _binaryMessenger;
-  final InstanceManager? _instanceManager;
+        ),
+        super.detached();
 
   late final WKWebViewConfigurationHostApiImpl _webViewConfigurationApi;
 
@@ -537,13 +635,16 @@ class WKWebViewConfiguration extends NSObject {
   late final WKUserContentController userContentController =
       WKUserContentController.fromWebViewConfiguration(
     this,
-    binaryMessenger: _binaryMessenger,
-    instanceManager: _instanceManager,
+    binaryMessenger: _webViewConfigurationApi.binaryMessenger,
+    instanceManager: _webViewConfigurationApi.instanceManager,
   );
 
   /// Manages the preference-related settings for the web view.
-  late final WKPreferences preferences =
-      WKPreferences.fromWebViewConfiguration(this);
+  late final WKPreferences preferences = WKPreferences.fromWebViewConfiguration(
+    this,
+    binaryMessenger: _webViewConfigurationApi.binaryMessenger,
+    instanceManager: _webViewConfigurationApi.instanceManager,
+  );
 
   /// Used to get and set the site’s cookies and to track the cached data objects.
   ///
@@ -551,8 +652,8 @@ class WKWebViewConfiguration extends NSObject {
   late final WKWebsiteDataStore websiteDataStore =
       WKWebsiteDataStore.fromWebViewConfiguration(
     this,
-    binaryMessenger: _binaryMessenger,
-    instanceManager: _instanceManager,
+    binaryMessenger: _webViewConfigurationApi.binaryMessenger,
+    instanceManager: _webViewConfigurationApi.instanceManager,
   );
 
   /// Indicates whether HTML5 videos play inline or use the native full-screen controller.
@@ -581,25 +682,54 @@ class WKWebViewConfiguration extends NSObject {
       types,
     );
   }
+
+  @override
+  WKWebViewConfiguration copy() {
+    return WKWebViewConfiguration.detached(
+      observeValue: observeValue,
+      binaryMessenger: _webViewConfigurationApi.binaryMessenger,
+      instanceManager: _webViewConfigurationApi.instanceManager,
+    );
+  }
 }
 
 /// The methods for presenting native user interface elements on behalf of a webpage.
 ///
 /// Wraps [WKUIDelegate](https://developer.apple.com/documentation/webkit/wkuidelegate?language=objc).
+@immutable
 class WKUIDelegate extends NSObject {
   /// Constructs a [WKUIDelegate].
   WKUIDelegate({
     this.onCreateWebView,
     super.observeValue,
-    BinaryMessenger? binaryMessenger,
-    InstanceManager? instanceManager,
-  }) : _uiDelegateApi = WKUIDelegateHostApiImpl(
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _uiDelegateApi = WKUIDelegateHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        ) {
+        ),
+        super.detached() {
+    // Ensures FlutterApis for the WebKit library are set up.
+    WebKitFlutterApis.instance.ensureSetUp();
     _uiDelegateApi.createForInstances(this);
   }
 
+  /// Constructs a [WKUIDelegate] without creating the associated Objective-C
+  /// object.
+  ///
+  /// This should only be used by subclasses created by this library or to
+  /// create copies.
+  WKUIDelegate.detached({
+    this.onCreateWebView,
+    super.observeValue,
+    super.binaryMessenger,
+    super.instanceManager,
+  })  : _uiDelegateApi = WKUIDelegateHostApiImpl(
+          binaryMessenger: binaryMessenger,
+          instanceManager: instanceManager,
+        ),
+        super.detached();
+
   final WKUIDelegateHostApiImpl _uiDelegateApi;
 
   /// Indicates a new [WKWebView] was requested to be created with [configuration].
@@ -608,6 +738,16 @@ class WKUIDelegate extends NSObject {
     WKWebViewConfiguration configuration,
     WKNavigationAction navigationAction,
   )? onCreateWebView;
+
+  @override
+  WKUIDelegate copy() {
+    return WKUIDelegate.detached(
+      onCreateWebView: onCreateWebView,
+      observeValue: observeValue,
+      binaryMessenger: _uiDelegateApi.binaryMessenger,
+      instanceManager: _uiDelegateApi.instanceManager,
+    );
+  }
 }
 
 /// Methods for handling navigation changes and tracking navigation requests.
@@ -629,10 +769,12 @@ class WKNavigationDelegate extends NSObject {
     super.observeValue,
     super.binaryMessenger,
     super.instanceManager,
-  }) : _navigationDelegateApi = WKNavigationDelegateHostApiImpl(
+  })  : _navigationDelegateApi = WKNavigationDelegateHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        ) {
+        ),
+        super.detached() {
+    // Ensures FlutterApis for the WebKit library are set up.
     WebKitFlutterApis.instance.ensureSetUp();
     _navigationDelegateApi.createForInstances(this);
   }
@@ -652,10 +794,11 @@ class WKNavigationDelegate extends NSObject {
     super.observeValue,
     super.binaryMessenger,
     super.instanceManager,
-  }) : _navigationDelegateApi = WKNavigationDelegateHostApiImpl(
+  })  : _navigationDelegateApi = WKNavigationDelegateHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        );
+        ),
+        super.detached();
 
   final WKNavigationDelegateHostApiImpl _navigationDelegateApi;
 
@@ -683,7 +826,7 @@ class WKNavigationDelegate extends NSObject {
   final void Function(WKWebView webView)? webViewWebContentProcessDidTerminate;
 
   @override
-  Copyable copy() {
+  WKNavigationDelegate copy() {
     return WKNavigationDelegate.detached(
       didFinishNavigation: didFinishNavigation,
       didStartProvisionalNavigation: didStartProvisionalNavigation,
@@ -697,26 +840,12 @@ class WKNavigationDelegate extends NSObject {
       instanceManager: _navigationDelegateApi.instanceManager,
     );
   }
-
-  @override
-  int get hashCode {
-    return Object.hash(didFinishNavigation, _navigationDelegateApi,
-        _navigationDelegateApi.instanceManager.getIdentifier(this));
-  }
-
-  @override
-  bool operator ==(Object other) {
-    return other is WKNavigationDelegate &&
-        didFinishNavigation == other.didFinishNavigation &&
-        _navigationDelegateApi == other._navigationDelegateApi &&
-        _navigationDelegateApi.instanceManager.getIdentifier(this) ==
-            other._navigationDelegateApi.instanceManager.getIdentifier(other);
-  }
 }
 
 /// Object that displays interactive web content, such as for an in-app browser.
 ///
 /// Wraps [WKWebView](https://developer.apple.com/documentation/webkit/wkwebview?language=objc).
+@immutable
 class WKWebView extends UIView {
   /// Constructs a [WKWebView].
   ///
@@ -732,17 +861,18 @@ class WKWebView extends UIView {
     super.observeValue,
     super.binaryMessenger,
     super.instanceManager,
-  })  : _binaryMessenger = binaryMessenger,
-        _instanceManager = instanceManager,
-        _webViewApi = WKWebViewHostApiImpl(
+  })  : _webViewApi = WKWebViewHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        ) {
+        ),
+        super.detached() {
+    // Ensures FlutterApis for the WebKit library are set up.
+    WebKitFlutterApis.instance.ensureSetUp();
     _webViewApi.createForInstances(this, configuration);
   }
 
-  /// Constructs a [WKWebView] without creating the associated
-  /// Objective-C object.
+  /// Constructs a [WKWebView] without creating the associated Objective-C
+  /// object.
   ///
   /// This should only be used outside of tests by subclasses created by this
   /// library or to create a copy for an InstanceManager.
@@ -750,15 +880,11 @@ class WKWebView extends UIView {
     super.observeValue,
     super.binaryMessenger,
     super.instanceManager,
-  })  : _binaryMessenger = binaryMessenger,
-        _instanceManager = instanceManager,
-        _webViewApi = WKWebViewHostApiImpl(
+  })  : _webViewApi = WKWebViewHostApiImpl(
           binaryMessenger: binaryMessenger,
           instanceManager: instanceManager,
-        );
-
-  final BinaryMessenger? _binaryMessenger;
-  final InstanceManager? _instanceManager;
+        ),
+        super.detached();
 
   final WKWebViewHostApiImpl _webViewApi;
 
@@ -774,15 +900,15 @@ class WKWebView extends UIView {
   late final WKWebViewConfiguration configuration =
       WKWebViewConfiguration.fromWebView(
     this,
-    binaryMessenger: _binaryMessenger,
-    instanceManager: _instanceManager,
+    binaryMessenger: _webViewApi.binaryMessenger,
+    instanceManager: _webViewApi.instanceManager,
   );
 
   /// The scrollable view associated with the web view.
   late final UIScrollView scrollView = UIScrollView.fromWebView(
     this,
-    binaryMessenger: _binaryMessenger,
-    instanceManager: _instanceManager,
+    binaryMessenger: _webViewApi.binaryMessenger,
+    instanceManager: _webViewApi.instanceManager,
   );
 
   /// Used to integrate custom user interface elements into web view interactions.
@@ -904,4 +1030,13 @@ class WKWebView extends UIView {
       javaScriptString,
     );
   }
+
+  @override
+  WKWebView copy() {
+    return WKWebView.detached(
+      observeValue: observeValue,
+      binaryMessenger: _webViewApi.binaryMessenger,
+      instanceManager: _webViewApi.instanceManager,
+    );
+  }
 }
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit_api_impls.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit_api_impls.dart
index d0423b44df84..6a7fb6254889 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit_api_impls.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit_api_impls.dart
@@ -296,6 +296,10 @@ class WebKitFlutterApis {
         uiDelegate,
         binaryMessenger: _binaryMessenger,
       );
+      WKWebViewConfigurationFlutterApi.setup(
+        webViewConfiguration,
+        binaryMessenger: _binaryMessenger,
+      );
       _hasBeenSetUp = true;
     }
   }
@@ -305,9 +309,16 @@ class WebKitFlutterApis {
 class WKWebsiteDataStoreHostApiImpl extends WKWebsiteDataStoreHostApi {
   /// Constructs a [WebsiteDataStoreHostApiImpl].
   WKWebsiteDataStoreHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -350,9 +361,16 @@ class WKWebsiteDataStoreHostApiImpl extends WKWebsiteDataStoreHostApi {
 class WKScriptMessageHandlerHostApiImpl extends WKScriptMessageHandlerHostApi {
   /// Constructs a [WKScriptMessageHandlerHostApiImpl].
   WKScriptMessageHandlerHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -396,9 +414,16 @@ class WKScriptMessageHandlerFlutterApiImpl
 class WKPreferencesHostApiImpl extends WKPreferencesHostApi {
   /// Constructs a [WKPreferencesHostApiImpl].
   WKPreferencesHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -430,9 +455,16 @@ class WKPreferencesHostApiImpl extends WKPreferencesHostApi {
 class WKHttpCookieStoreHostApiImpl extends WKHttpCookieStoreHostApi {
   /// Constructs a [WKHttpCookieStoreHostApiImpl].
   WKHttpCookieStoreHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -465,9 +497,16 @@ class WKUserContentControllerHostApiImpl
     extends WKUserContentControllerHostApi {
   /// Constructs a [WKUserContentControllerHostApiImpl].
   WKUserContentControllerHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -539,9 +578,16 @@ class WKUserContentControllerHostApiImpl
 class WKWebViewConfigurationHostApiImpl extends WKWebViewConfigurationHostApi {
   /// Constructs a [WKWebViewConfigurationHostApiImpl].
   WKWebViewConfigurationHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -620,9 +666,16 @@ class WKWebViewConfigurationFlutterApiImpl
 class WKUIDelegateHostApiImpl extends WKUIDelegateHostApi {
   /// Constructs a [WKUIDelegateHostApiImpl].
   WKUIDelegateHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
@@ -666,7 +719,6 @@ class WKUIDelegateFlutterApiImpl extends WKUIDelegateFlutterApi {
 }
 
 /// Host api implementation for [WKNavigationDelegate].
-@immutable
 class WKNavigationDelegateHostApiImpl extends WKNavigationDelegateHostApi {
   /// Constructs a [WKNavigationDelegateHostApiImpl].
   WKNavigationDelegateHostApiImpl({
@@ -688,18 +740,6 @@ class WKNavigationDelegateHostApiImpl extends WKNavigationDelegateHostApi {
   Future<void> createForInstances(WKNavigationDelegate instance) async {
     return create(instanceManager.addDartCreatedInstance(instance));
   }
-
-  @override
-  int get hashCode {
-    return Object.hash(binaryMessenger, instanceManager);
-  }
-
-  @override
-  bool operator ==(Object other) {
-    return other is WKNavigationDelegateHostApiImpl &&
-        binaryMessenger == other.binaryMessenger &&
-        instanceManager == other.instanceManager;
-  }
 }
 
 /// Flutter api implementation for [WKNavigationDelegate].
@@ -819,9 +859,16 @@ class WKNavigationDelegateFlutterApiImpl
 class WKWebViewHostApiImpl extends WKWebViewHostApi {
   /// Constructs a [WKWebViewHostApiImpl].
   WKWebViewHostApiImpl({
-    super.binaryMessenger,
+    this.binaryMessenger,
     InstanceManager? instanceManager,
-  }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager;
+  })  : instanceManager = instanceManager ?? NSObject.globalInstanceManager,
+        super(binaryMessenger: binaryMessenger);
+
+  /// Sends binary data across the Flutter platform barrier.
+  ///
+  /// If it is null, the default BinaryMessenger will be used which routes to
+  /// the host platform.
+  final BinaryMessenger? binaryMessenger;
 
   /// Maintains instances stored to communicate with Objective-C objects.
   final InstanceManager instanceManager;
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit_webview_widget.dart b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit_webview_widget.dart
index 99195fba4c33..ed1912ee7898 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit_webview_widget.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit_webview_widget.dart
@@ -330,8 +330,6 @@ class WebKitWebViewPlatformController extends WebViewPlatformController {
       // unsupported. This also goes for `null` and `undefined` on iOS 14+. For
       // example, when running a void function. For ease of use, this specific
       // error is ignored when no return value is expected.
-      // TODO(bparrishMines): Ensure the platform code includes the NSError in
-      // the FlutterError.details.
       if (exception.details is! NSError ||
           exception.details.code !=
               WKErrorCode.javaScriptResultTypeIsUnsupported) {
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/test/src/foundation/foundation_test.dart b/packages/webview_flutter/webview_flutter_wkwebview/test/src/foundation/foundation_test.dart
index d97d152739c4..87b659885b52 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/test/src/foundation/foundation_test.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/test/src/foundation/foundation_test.dart
@@ -37,7 +37,7 @@ void main() {
         mockPlatformHostApi = MockTestNSObjectHostApi();
         TestNSObjectHostApi.setup(mockPlatformHostApi);
 
-        object = NSObject(instanceManager: instanceManager);
+        object = NSObject.detached(instanceManager: instanceManager);
         instanceManager.addDartCreatedInstance(object);
       });
 
@@ -46,7 +46,9 @@ void main() {
       });
 
       test('addObserver', () async {
-        final NSObject observer = NSObject(instanceManager: instanceManager);
+        final NSObject observer = NSObject.detached(
+          instanceManager: instanceManager,
+        );
         instanceManager.addDartCreatedInstance(observer);
 
         await object.addObserver(
@@ -78,7 +80,9 @@ void main() {
       });
 
       test('removeObserver', () async {
-        final NSObject observer = NSObject(instanceManager: instanceManager);
+        final NSObject observer = NSObject.detached(
+          instanceManager: instanceManager,
+        );
         instanceManager.addDartCreatedInstance(observer);
 
         await object.removeObserver(observer, keyPath: 'aKeyPath');
@@ -97,7 +101,9 @@ void main() {
           callbackIdentifier = identifier;
         });
 
-        final NSObject object = NSObject(instanceManager: instanceManager);
+        final NSObject object = NSObject.detached(
+          instanceManager: instanceManager,
+        );
         final int identifier = instanceManager.addDartCreatedInstance(object);
 
         NSObject.dispose(object);
@@ -112,7 +118,7 @@ void main() {
           instanceManager: instanceManager,
         );
 
-        object = NSObject(
+        object = NSObject.detached(
           instanceManager: instanceManager,
           observeValue: (
             String keyPath,
@@ -151,7 +157,7 @@ void main() {
           instanceManager: instanceManager,
         );
 
-        object = NSObject(instanceManager: instanceManager);
+        object = NSObject.detached(instanceManager: instanceManager);
         instanceManager.addHostCreatedInstance(object, 1);
 
         instanceManager.removeWeakReference(object);
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/test/src/ui_kit/ui_kit_test.dart b/packages/webview_flutter/webview_flutter_wkwebview/test/src/ui_kit/ui_kit_test.dart
index aeb4e1cc54ce..f2250e1ac423 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/test/src/ui_kit/ui_kit_test.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/test/src/ui_kit/ui_kit_test.dart
@@ -97,7 +97,7 @@ void main() {
         mockPlatformHostApi = MockTestUIViewHostApi();
         TestUIViewHostApi.setup(mockPlatformHostApi);
 
-        view = UIView(instanceManager: instanceManager);
+        view = UIView.detached(instanceManager: instanceManager);
         viewInstanceId = instanceManager.addDartCreatedInstance(view);
       });
 
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_cookie_manager_test.mocks.dart b/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_cookie_manager_test.mocks.dart
index b0c63b663066..e44e7b13a205 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_cookie_manager_test.mocks.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_cookie_manager_test.mocks.dart
@@ -2,14 +2,12 @@
 // in webview_flutter_wkwebview/example/ios/.symlinks/plugins/webview_flutter_wkwebview/test/src/web_kit_cookie_manager_test.dart.
 // Do not manually edit this file.
 
-import 'dart:async' as _i4;
+import 'dart:async' as _i3;
 
 import 'package:mockito/mockito.dart' as _i1;
-import 'package:webview_flutter_wkwebview/src/common/instance_manager.dart'
-    as _i2;
 import 'package:webview_flutter_wkwebview/src/foundation/foundation.dart'
-    as _i5;
-import 'package:webview_flutter_wkwebview/src/web_kit/web_kit.dart' as _i3;
+    as _i4;
+import 'package:webview_flutter_wkwebview/src/web_kit/web_kit.dart' as _i2;
 
 // ignore_for_file: type=lint
 // ignore_for_file: avoid_redundant_argument_values
@@ -21,77 +19,82 @@ import 'package:webview_flutter_wkwebview/src/web_kit/web_kit.dart' as _i3;
 // ignore_for_file: unnecessary_parenthesis
 // ignore_for_file: camel_case_types
 
-class _FakeCopyable_0 extends _i1.Fake implements _i2.Copyable {}
+class _FakeWKHttpCookieStore_0 extends _i1.Fake
+    implements _i2.WKHttpCookieStore {}
 
-class _FakeWKHttpCookieStore_1 extends _i1.Fake
-    implements _i3.WKHttpCookieStore {}
+class _FakeWKWebsiteDataStore_1 extends _i1.Fake
+    implements _i2.WKWebsiteDataStore {}
 
 /// A class which mocks [WKHttpCookieStore].
 ///
 /// See the documentation for Mockito's code generation for more information.
-class MockWKHttpCookieStore extends _i1.Mock implements _i3.WKHttpCookieStore {
+// ignore: must_be_immutable
+class MockWKHttpCookieStore extends _i1.Mock implements _i2.WKHttpCookieStore {
   MockWKHttpCookieStore() {
     _i1.throwOnMissingStub(this);
   }
 
   @override
-  _i4.Future<void> setCookie(_i5.NSHttpCookie? cookie) =>
+  _i3.Future<void> setCookie(_i4.NSHttpCookie? cookie) =>
       (super.noSuchMethod(Invocation.method(#setCookie, [cookie]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i4.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
   @override
-  _i4.Future<void> addObserver(_i5.NSObject? observer,
-          {String? keyPath, Set<_i5.NSKeyValueObservingOptions>? options}) =>
+  _i2.WKHttpCookieStore copy() =>
+      (super.noSuchMethod(Invocation.method(#copy, []),
+          returnValue: _FakeWKHttpCookieStore_0()) as _i2.WKHttpCookieStore);
+  @override
+  _i3.Future<void> addObserver(_i4.NSObject? observer,
+          {String? keyPath, Set<_i4.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i4.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
   @override
-  _i4.Future<void> removeObserver(_i5.NSObject? observer, {String? keyPath}) =>
+  _i3.Future<void> removeObserver(_i4.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i4.Future<void>);
-  @override
-  _i2.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_0()) as _i2.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
 }
 
 /// A class which mocks [WKWebsiteDataStore].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKWebsiteDataStore extends _i1.Mock
-    implements _i3.WKWebsiteDataStore {
+    implements _i2.WKWebsiteDataStore {
   MockWKWebsiteDataStore() {
     _i1.throwOnMissingStub(this);
   }
 
   @override
-  _i3.WKHttpCookieStore get httpCookieStore =>
+  _i2.WKHttpCookieStore get httpCookieStore =>
       (super.noSuchMethod(Invocation.getter(#httpCookieStore),
-          returnValue: _FakeWKHttpCookieStore_1()) as _i3.WKHttpCookieStore);
+          returnValue: _FakeWKHttpCookieStore_0()) as _i2.WKHttpCookieStore);
   @override
-  _i4.Future<bool> removeDataOfTypes(
-          Set<_i3.WKWebsiteDataType>? dataTypes, DateTime? since) =>
+  _i3.Future<bool> removeDataOfTypes(
+          Set<_i2.WKWebsiteDataType>? dataTypes, DateTime? since) =>
       (super.noSuchMethod(
           Invocation.method(#removeDataOfTypes, [dataTypes, since]),
-          returnValue: Future<bool>.value(false)) as _i4.Future<bool>);
+          returnValue: Future<bool>.value(false)) as _i3.Future<bool>);
   @override
-  _i4.Future<void> addObserver(_i5.NSObject? observer,
-          {String? keyPath, Set<_i5.NSKeyValueObservingOptions>? options}) =>
+  _i2.WKWebsiteDataStore copy() =>
+      (super.noSuchMethod(Invocation.method(#copy, []),
+          returnValue: _FakeWKWebsiteDataStore_1()) as _i2.WKWebsiteDataStore);
+  @override
+  _i3.Future<void> addObserver(_i4.NSObject? observer,
+          {String? keyPath, Set<_i4.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i4.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
   @override
-  _i4.Future<void> removeObserver(_i5.NSObject? observer, {String? keyPath}) =>
+  _i3.Future<void> removeObserver(_i4.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i4.Future<void>);
-  @override
-  _i2.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_0()) as _i2.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i3.Future<void>);
 }
diff --git a/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_webview_widget_test.mocks.dart b/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_webview_widget_test.mocks.dart
index 6161bd044435..f216711ca0b2 100644
--- a/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_webview_widget_test.mocks.dart
+++ b/packages/webview_flutter/webview_flutter_wkwebview/test/src/web_kit_webview_widget_test.mocks.dart
@@ -2,25 +2,23 @@
 // in webview_flutter_wkwebview/example/ios/.symlinks/plugins/webview_flutter_wkwebview/test/src/web_kit_webview_widget_test.dart.
 // Do not manually edit this file.
 
-import 'dart:async' as _i6;
+import 'dart:async' as _i5;
 import 'dart:math' as _i2;
-import 'dart:ui' as _i7;
+import 'dart:ui' as _i6;
 
 import 'package:mockito/mockito.dart' as _i1;
 import 'package:webview_flutter_platform_interface/src/types/javascript_channel.dart'
-    as _i10;
+    as _i9;
 import 'package:webview_flutter_platform_interface/src/types/types.dart'
-    as _i11;
+    as _i10;
 import 'package:webview_flutter_platform_interface/webview_flutter_platform_interface.dart'
-    as _i9;
-import 'package:webview_flutter_wkwebview/src/common/instance_manager.dart'
-    as _i3;
-import 'package:webview_flutter_wkwebview/src/foundation/foundation.dart'
     as _i8;
-import 'package:webview_flutter_wkwebview/src/ui_kit/ui_kit.dart' as _i5;
+import 'package:webview_flutter_wkwebview/src/foundation/foundation.dart'
+    as _i7;
+import 'package:webview_flutter_wkwebview/src/ui_kit/ui_kit.dart' as _i3;
 import 'package:webview_flutter_wkwebview/src/web_kit/web_kit.dart' as _i4;
 import 'package:webview_flutter_wkwebview/src/web_kit_webview_widget.dart'
-    as _i12;
+    as _i11;
 
 // ignore_for_file: type=lint
 // ignore_for_file: avoid_redundant_argument_values
@@ -34,84 +32,83 @@ import 'package:webview_flutter_wkwebview/src/web_kit_webview_widget.dart'
 
 class _FakePoint_0<T extends num> extends _i1.Fake implements _i2.Point<T> {}
 
-class _FakeCopyable_1 extends _i1.Fake implements _i3.Copyable {}
+class _FakeUIScrollView_1 extends _i1.Fake implements _i3.UIScrollView {}
+
+class _FakeWKNavigationDelegate_2 extends _i1.Fake
+    implements _i4.WKNavigationDelegate {}
+
+class _FakeWKPreferences_3 extends _i1.Fake implements _i4.WKPreferences {}
 
-class _FakeWKWebViewConfiguration_2 extends _i1.Fake
+class _FakeWKScriptMessageHandler_4 extends _i1.Fake
+    implements _i4.WKScriptMessageHandler {}
+
+class _FakeWKWebViewConfiguration_5 extends _i1.Fake
     implements _i4.WKWebViewConfiguration {}
 
-class _FakeUIScrollView_3 extends _i1.Fake implements _i5.UIScrollView {}
+class _FakeWKWebView_6 extends _i1.Fake implements _i4.WKWebView {}
 
-class _FakeWKUserContentController_4 extends _i1.Fake
+class _FakeWKUserContentController_7 extends _i1.Fake
     implements _i4.WKUserContentController {}
 
-class _FakeWKPreferences_5 extends _i1.Fake implements _i4.WKPreferences {}
-
-class _FakeWKWebsiteDataStore_6 extends _i1.Fake
+class _FakeWKWebsiteDataStore_8 extends _i1.Fake
     implements _i4.WKWebsiteDataStore {}
 
-class _FakeWKHttpCookieStore_7 extends _i1.Fake
+class _FakeWKHttpCookieStore_9 extends _i1.Fake
     implements _i4.WKHttpCookieStore {}
 
-class _FakeWKWebView_8 extends _i1.Fake implements _i4.WKWebView {}
-
-class _FakeWKScriptMessageHandler_9 extends _i1.Fake
-    implements _i4.WKScriptMessageHandler {}
-
 class _FakeWKUIDelegate_10 extends _i1.Fake implements _i4.WKUIDelegate {}
 
-class _FakeWKNavigationDelegate_11 extends _i1.Fake
-    implements _i4.WKNavigationDelegate {}
-
 /// A class which mocks [UIScrollView].
 ///
 /// See the documentation for Mockito's code generation for more information.
-class MockUIScrollView extends _i1.Mock implements _i5.UIScrollView {
+// ignore: must_be_immutable
+class MockUIScrollView extends _i1.Mock implements _i3.UIScrollView {
   MockUIScrollView() {
     _i1.throwOnMissingStub(this);
   }
 
   @override
-  _i6.Future<_i2.Point<double>> getContentOffset() => (super.noSuchMethod(
+  _i5.Future<_i2.Point<double>> getContentOffset() => (super.noSuchMethod(
           Invocation.method(#getContentOffset, []),
           returnValue: Future<_i2.Point<double>>.value(_FakePoint_0<double>()))
-      as _i6.Future<_i2.Point<double>>);
+      as _i5.Future<_i2.Point<double>>);
   @override
-  _i6.Future<void> scrollBy(_i2.Point<double>? offset) =>
+  _i5.Future<void> scrollBy(_i2.Point<double>? offset) =>
       (super.noSuchMethod(Invocation.method(#scrollBy, [offset]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> setContentOffset(_i2.Point<double>? offset) =>
+  _i5.Future<void> setContentOffset(_i2.Point<double>? offset) =>
       (super.noSuchMethod(Invocation.method(#setContentOffset, [offset]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
+  @override
+  _i3.UIScrollView copy() => (super.noSuchMethod(Invocation.method(#copy, []),
+      returnValue: _FakeUIScrollView_1()) as _i3.UIScrollView);
   @override
-  _i6.Future<void> setBackgroundColor(_i7.Color? color) =>
+  _i5.Future<void> setBackgroundColor(_i6.Color? color) =>
       (super.noSuchMethod(Invocation.method(#setBackgroundColor, [color]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> setOpaque(bool? opaque) =>
+  _i5.Future<void> setOpaque(bool? opaque) =>
       (super.noSuchMethod(Invocation.method(#setOpaque, [opaque]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKNavigationDelegate].
@@ -125,59 +122,62 @@ class MockWKNavigationDelegate extends _i1.Mock
   }
 
   @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+  _i4.WKNavigationDelegate copy() => (super.noSuchMethod(
+      Invocation.method(#copy, []),
+      returnValue: _FakeWKNavigationDelegate_2()) as _i4.WKNavigationDelegate);
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKPreferences].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKPreferences extends _i1.Mock implements _i4.WKPreferences {
   MockWKPreferences() {
     _i1.throwOnMissingStub(this);
   }
 
   @override
-  _i6.Future<void> setJavaScriptEnabled(bool? enabled) =>
+  _i5.Future<void> setJavaScriptEnabled(bool? enabled) =>
       (super.noSuchMethod(Invocation.method(#setJavaScriptEnabled, [enabled]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i4.WKPreferences copy() => (super.noSuchMethod(Invocation.method(#copy, []),
+      returnValue: _FakeWKPreferences_3()) as _i4.WKPreferences);
+  @override
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKScriptMessageHandler].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKScriptMessageHandler extends _i1.Mock
     implements _i4.WKScriptMessageHandler {
   MockWKScriptMessageHandler() {
@@ -192,27 +192,30 @@ class MockWKScriptMessageHandler extends _i1.Mock
                   _i4.WKScriptMessage message) {}) as void Function(
               _i4.WKUserContentController, _i4.WKScriptMessage));
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i4.WKScriptMessageHandler copy() =>
+      (super.noSuchMethod(Invocation.method(#copy, []),
+              returnValue: _FakeWKScriptMessageHandler_4())
+          as _i4.WKScriptMessageHandler);
+  @override
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKWebView].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKWebView extends _i1.Mock implements _i4.WKWebView {
   MockWKWebView() {
     _i1.throwOnMissingStub(this);
@@ -221,127 +224,128 @@ class MockWKWebView extends _i1.Mock implements _i4.WKWebView {
   @override
   _i4.WKWebViewConfiguration get configuration =>
       (super.noSuchMethod(Invocation.getter(#configuration),
-              returnValue: _FakeWKWebViewConfiguration_2())
+              returnValue: _FakeWKWebViewConfiguration_5())
           as _i4.WKWebViewConfiguration);
   @override
-  _i5.UIScrollView get scrollView =>
+  _i3.UIScrollView get scrollView =>
       (super.noSuchMethod(Invocation.getter(#scrollView),
-          returnValue: _FakeUIScrollView_3()) as _i5.UIScrollView);
+          returnValue: _FakeUIScrollView_1()) as _i3.UIScrollView);
   @override
-  _i6.Future<void> setUIDelegate(_i4.WKUIDelegate? delegate) =>
+  _i5.Future<void> setUIDelegate(_i4.WKUIDelegate? delegate) =>
       (super.noSuchMethod(Invocation.method(#setUIDelegate, [delegate]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> setNavigationDelegate(_i4.WKNavigationDelegate? delegate) =>
+  _i5.Future<void> setNavigationDelegate(_i4.WKNavigationDelegate? delegate) =>
       (super.noSuchMethod(Invocation.method(#setNavigationDelegate, [delegate]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<String?> getUrl() =>
+  _i5.Future<String?> getUrl() =>
       (super.noSuchMethod(Invocation.method(#getUrl, []),
-          returnValue: Future<String?>.value()) as _i6.Future<String?>);
+          returnValue: Future<String?>.value()) as _i5.Future<String?>);
   @override
-  _i6.Future<double> getEstimatedProgress() =>
+  _i5.Future<double> getEstimatedProgress() =>
       (super.noSuchMethod(Invocation.method(#getEstimatedProgress, []),
-          returnValue: Future<double>.value(0.0)) as _i6.Future<double>);
+          returnValue: Future<double>.value(0.0)) as _i5.Future<double>);
   @override
-  _i6.Future<void> loadRequest(_i8.NSUrlRequest? request) =>
+  _i5.Future<void> loadRequest(_i7.NSUrlRequest? request) =>
       (super.noSuchMethod(Invocation.method(#loadRequest, [request]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> loadHtmlString(String? string, {String? baseUrl}) =>
+  _i5.Future<void> loadHtmlString(String? string, {String? baseUrl}) =>
       (super.noSuchMethod(
           Invocation.method(#loadHtmlString, [string], {#baseUrl: baseUrl}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> loadFileUrl(String? url, {String? readAccessUrl}) =>
+  _i5.Future<void> loadFileUrl(String? url, {String? readAccessUrl}) =>
       (super.noSuchMethod(
           Invocation.method(
               #loadFileUrl, [url], {#readAccessUrl: readAccessUrl}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> loadFlutterAsset(String? key) =>
+  _i5.Future<void> loadFlutterAsset(String? key) =>
       (super.noSuchMethod(Invocation.method(#loadFlutterAsset, [key]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<bool> canGoBack() =>
+  _i5.Future<bool> canGoBack() =>
       (super.noSuchMethod(Invocation.method(#canGoBack, []),
-          returnValue: Future<bool>.value(false)) as _i6.Future<bool>);
+          returnValue: Future<bool>.value(false)) as _i5.Future<bool>);
   @override
-  _i6.Future<bool> canGoForward() =>
+  _i5.Future<bool> canGoForward() =>
       (super.noSuchMethod(Invocation.method(#canGoForward, []),
-          returnValue: Future<bool>.value(false)) as _i6.Future<bool>);
+          returnValue: Future<bool>.value(false)) as _i5.Future<bool>);
   @override
-  _i6.Future<void> goBack() =>
+  _i5.Future<void> goBack() =>
       (super.noSuchMethod(Invocation.method(#goBack, []),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> goForward() =>
+  _i5.Future<void> goForward() =>
       (super.noSuchMethod(Invocation.method(#goForward, []),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> reload() =>
+  _i5.Future<void> reload() =>
       (super.noSuchMethod(Invocation.method(#reload, []),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<String?> getTitle() =>
+  _i5.Future<String?> getTitle() =>
       (super.noSuchMethod(Invocation.method(#getTitle, []),
-          returnValue: Future<String?>.value()) as _i6.Future<String?>);
+          returnValue: Future<String?>.value()) as _i5.Future<String?>);
   @override
-  _i6.Future<void> setAllowsBackForwardNavigationGestures(bool? allow) =>
+  _i5.Future<void> setAllowsBackForwardNavigationGestures(bool? allow) =>
       (super.noSuchMethod(
           Invocation.method(#setAllowsBackForwardNavigationGestures, [allow]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> setCustomUserAgent(String? userAgent) =>
+  _i5.Future<void> setCustomUserAgent(String? userAgent) =>
       (super.noSuchMethod(Invocation.method(#setCustomUserAgent, [userAgent]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<Object?> evaluateJavaScript(String? javaScriptString) => (super
+  _i5.Future<Object?> evaluateJavaScript(String? javaScriptString) => (super
       .noSuchMethod(Invocation.method(#evaluateJavaScript, [javaScriptString]),
-          returnValue: Future<Object?>.value()) as _i6.Future<Object?>);
+          returnValue: Future<Object?>.value()) as _i5.Future<Object?>);
+  @override
+  _i4.WKWebView copy() => (super.noSuchMethod(Invocation.method(#copy, []),
+      returnValue: _FakeWKWebView_6()) as _i4.WKWebView);
   @override
-  _i6.Future<void> setBackgroundColor(_i7.Color? color) =>
+  _i5.Future<void> setBackgroundColor(_i6.Color? color) =>
       (super.noSuchMethod(Invocation.method(#setBackgroundColor, [color]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> setOpaque(bool? opaque) =>
+  _i5.Future<void> setOpaque(bool? opaque) =>
       (super.noSuchMethod(Invocation.method(#setOpaque, [opaque]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKWebViewConfiguration].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKWebViewConfiguration extends _i1.Mock
     implements _i4.WKWebViewConfiguration {
   MockWKWebViewConfiguration() {
@@ -351,51 +355,54 @@ class MockWKWebViewConfiguration extends _i1.Mock
   @override
   _i4.WKUserContentController get userContentController =>
       (super.noSuchMethod(Invocation.getter(#userContentController),
-              returnValue: _FakeWKUserContentController_4())
+              returnValue: _FakeWKUserContentController_7())
           as _i4.WKUserContentController);
   @override
   _i4.WKPreferences get preferences =>
       (super.noSuchMethod(Invocation.getter(#preferences),
-          returnValue: _FakeWKPreferences_5()) as _i4.WKPreferences);
+          returnValue: _FakeWKPreferences_3()) as _i4.WKPreferences);
   @override
   _i4.WKWebsiteDataStore get websiteDataStore =>
       (super.noSuchMethod(Invocation.getter(#websiteDataStore),
-          returnValue: _FakeWKWebsiteDataStore_6()) as _i4.WKWebsiteDataStore);
+          returnValue: _FakeWKWebsiteDataStore_8()) as _i4.WKWebsiteDataStore);
   @override
-  _i6.Future<void> setAllowsInlineMediaPlayback(bool? allow) => (super
+  _i5.Future<void> setAllowsInlineMediaPlayback(bool? allow) => (super
       .noSuchMethod(Invocation.method(#setAllowsInlineMediaPlayback, [allow]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> setMediaTypesRequiringUserActionForPlayback(
+  _i5.Future<void> setMediaTypesRequiringUserActionForPlayback(
           Set<_i4.WKAudiovisualMediaType>? types) =>
       (super.noSuchMethod(
           Invocation.method(
               #setMediaTypesRequiringUserActionForPlayback, [types]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
+  @override
+  _i4.WKWebViewConfiguration copy() =>
+      (super.noSuchMethod(Invocation.method(#copy, []),
+              returnValue: _FakeWKWebViewConfiguration_5())
+          as _i4.WKWebViewConfiguration);
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKWebsiteDataStore].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKWebsiteDataStore extends _i1.Mock
     implements _i4.WKWebsiteDataStore {
   MockWKWebsiteDataStore() {
@@ -405,62 +412,65 @@ class MockWKWebsiteDataStore extends _i1.Mock
   @override
   _i4.WKHttpCookieStore get httpCookieStore =>
       (super.noSuchMethod(Invocation.getter(#httpCookieStore),
-          returnValue: _FakeWKHttpCookieStore_7()) as _i4.WKHttpCookieStore);
+          returnValue: _FakeWKHttpCookieStore_9()) as _i4.WKHttpCookieStore);
   @override
-  _i6.Future<bool> removeDataOfTypes(
+  _i5.Future<bool> removeDataOfTypes(
           Set<_i4.WKWebsiteDataType>? dataTypes, DateTime? since) =>
       (super.noSuchMethod(
           Invocation.method(#removeDataOfTypes, [dataTypes, since]),
-          returnValue: Future<bool>.value(false)) as _i6.Future<bool>);
+          returnValue: Future<bool>.value(false)) as _i5.Future<bool>);
+  @override
+  _i4.WKWebsiteDataStore copy() =>
+      (super.noSuchMethod(Invocation.method(#copy, []),
+          returnValue: _FakeWKWebsiteDataStore_8()) as _i4.WKWebsiteDataStore);
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKUIDelegate].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKUIDelegate extends _i1.Mock implements _i4.WKUIDelegate {
   MockWKUIDelegate() {
     _i1.throwOnMissingStub(this);
   }
 
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i4.WKUIDelegate copy() => (super.noSuchMethod(Invocation.method(#copy, []),
+      returnValue: _FakeWKUIDelegate_10()) as _i4.WKUIDelegate);
+  @override
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [WKUserContentController].
 ///
 /// See the documentation for Mockito's code generation for more information.
+// ignore: must_be_immutable
 class MockWKUserContentController extends _i1.Mock
     implements _i4.WKUserContentController {
   MockWKUserContentController() {
@@ -468,72 +478,74 @@ class MockWKUserContentController extends _i1.Mock
   }
 
   @override
-  _i6.Future<void> addScriptMessageHandler(
+  _i5.Future<void> addScriptMessageHandler(
           _i4.WKScriptMessageHandler? handler, String? name) =>
       (super.noSuchMethod(
           Invocation.method(#addScriptMessageHandler, [handler, name]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeScriptMessageHandler(String? name) => (super
+  _i5.Future<void> removeScriptMessageHandler(String? name) => (super
       .noSuchMethod(Invocation.method(#removeScriptMessageHandler, [name]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeAllScriptMessageHandlers() => (super.noSuchMethod(
+  _i5.Future<void> removeAllScriptMessageHandlers() => (super.noSuchMethod(
       Invocation.method(#removeAllScriptMessageHandlers, []),
       returnValue: Future<void>.value(),
-      returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+      returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> addUserScript(_i4.WKUserScript? userScript) =>
+  _i5.Future<void> addUserScript(_i4.WKUserScript? userScript) =>
       (super.noSuchMethod(Invocation.method(#addUserScript, [userScript]),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeAllUserScripts() =>
+  _i5.Future<void> removeAllUserScripts() =>
       (super.noSuchMethod(Invocation.method(#removeAllUserScripts, []),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> addObserver(_i8.NSObject? observer,
-          {String? keyPath, Set<_i8.NSKeyValueObservingOptions>? options}) =>
+  _i4.WKUserContentController copy() =>
+      (super.noSuchMethod(Invocation.method(#copy, []),
+              returnValue: _FakeWKUserContentController_7())
+          as _i4.WKUserContentController);
+  @override
+  _i5.Future<void> addObserver(_i7.NSObject? observer,
+          {String? keyPath, Set<_i7.NSKeyValueObservingOptions>? options}) =>
       (super.noSuchMethod(
           Invocation.method(
               #addObserver, [observer], {#keyPath: keyPath, #options: options}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
   @override
-  _i6.Future<void> removeObserver(_i8.NSObject? observer, {String? keyPath}) =>
+  _i5.Future<void> removeObserver(_i7.NSObject? observer, {String? keyPath}) =>
       (super.noSuchMethod(
           Invocation.method(#removeObserver, [observer], {#keyPath: keyPath}),
           returnValue: Future<void>.value(),
-          returnValueForMissingStub: Future<void>.value()) as _i6.Future<void>);
-  @override
-  _i3.Copyable copy() => (super.noSuchMethod(Invocation.method(#copy, []),
-      returnValue: _FakeCopyable_1()) as _i3.Copyable);
+          returnValueForMissingStub: Future<void>.value()) as _i5.Future<void>);
 }
 
 /// A class which mocks [JavascriptChannelRegistry].
 ///
 /// See the documentation for Mockito's code generation for more information.
 class MockJavascriptChannelRegistry extends _i1.Mock
-    implements _i9.JavascriptChannelRegistry {
+    implements _i8.JavascriptChannelRegistry {
   MockJavascriptChannelRegistry() {
     _i1.throwOnMissingStub(this);
   }
 
   @override
-  Map<String, _i10.JavascriptChannel> get channels =>
+  Map<String, _i9.JavascriptChannel> get channels =>
       (super.noSuchMethod(Invocation.getter(#channels),
-              returnValue: <String, _i10.JavascriptChannel>{})
-          as Map<String, _i10.JavascriptChannel>);
+              returnValue: <String, _i9.JavascriptChannel>{})
+          as Map<String, _i9.JavascriptChannel>);
   @override
   void onJavascriptChannelMessage(String? channel, String? message) =>
       super.noSuchMethod(
           Invocation.method(#onJavascriptChannelMessage, [channel, message]),
           returnValueForMissingStub: null);
   @override
-  void updateJavascriptChannelsFromSet(Set<_i10.JavascriptChannel>? channels) =>
+  void updateJavascriptChannelsFromSet(Set<_i9.JavascriptChannel>? channels) =>
       super.noSuchMethod(
           Invocation.method(#updateJavascriptChannelsFromSet, [channels]),
           returnValueForMissingStub: null);
@@ -543,17 +555,17 @@ class MockJavascriptChannelRegistry extends _i1.Mock
 ///
 /// See the documentation for Mockito's code generation for more information.
 class MockWebViewPlatformCallbacksHandler extends _i1.Mock
-    implements _i9.WebViewPlatformCallbacksHandler {
+    implements _i8.WebViewPlatformCallbacksHandler {
   MockWebViewPlatformCallbacksHandler() {
     _i1.throwOnMissingStub(this);
   }
 
   @override
-  _i6.FutureOr<bool> onNavigationRequest({String? url, bool? isForMainFrame}) =>
+  _i5.FutureOr<bool> onNavigationRequest({String? url, bool? isForMainFrame}) =>
       (super.noSuchMethod(
           Invocation.method(#onNavigationRequest, [],
               {#url: url, #isForMainFrame: isForMainFrame}),
-          returnValue: Future<bool>.value(false)) as _i6.FutureOr<bool>);
+          returnValue: Future<bool>.value(false)) as _i5.FutureOr<bool>);
   @override
   void onPageStarted(String? url) =>
       super.noSuchMethod(Invocation.method(#onPageStarted, [url]),
@@ -567,7 +579,7 @@ class MockWebViewPlatformCallbacksHandler extends _i1.Mock
       super.noSuchMethod(Invocation.method(#onProgress, [progress]),
           returnValueForMissingStub: null);
   @override
-  void onWebResourceError(_i11.WebResourceError? error) =>
+  void onWebResourceError(_i10.WebResourceError? error) =>
       super.noSuchMethod(Invocation.method(#onWebResourceError, [error]),
           returnValueForMissingStub: null);
 }
@@ -576,7 +588,7 @@ class MockWebViewPlatformCallbacksHandler extends _i1.Mock
 ///
 /// See the documentation for Mockito's code generation for more information.
 class MockWebViewWidgetProxy extends _i1.Mock
-    implements _i12.WebViewWidgetProxy {
+    implements _i11.WebViewWidgetProxy {
   MockWebViewWidgetProxy() {
     _i1.throwOnMissingStub(this);
   }
@@ -584,12 +596,12 @@ class MockWebViewWidgetProxy extends _i1.Mock
   @override
   _i4.WKWebView createWebView(_i4.WKWebViewConfiguration? configuration,
           {void Function(
-                  String, _i8.NSObject, Map<_i8.NSKeyValueChangeKey, Object?>)?
+                  String, _i7.NSObject, Map<_i7.NSKeyValueChangeKey, Object?>)?
               observeValue}) =>
       (super.noSuchMethod(
           Invocation.method(
               #createWebView, [configuration], {#observeValue: observeValue}),
-          returnValue: _FakeWKWebView_8()) as _i4.WKWebView);
+          returnValue: _FakeWKWebView_6()) as _i4.WKWebView);
   @override
   _i4.WKScriptMessageHandler createScriptMessageHandler(
           {void Function(_i4.WKUserContentController, _i4.WKScriptMessage)?
@@ -597,7 +609,7 @@ class MockWebViewWidgetProxy extends _i1.Mock
       (super.noSuchMethod(
               Invocation.method(#createScriptMessageHandler, [],
                   {#didReceiveScriptMessage: didReceiveScriptMessage}),
-              returnValue: _FakeWKScriptMessageHandler_9())
+              returnValue: _FakeWKScriptMessageHandler_4())
           as _i4.WKScriptMessageHandler);
   @override
   _i4.WKUIDelegate createUIDelgate(
@@ -612,11 +624,11 @@ class MockWebViewWidgetProxy extends _i1.Mock
   _i4.WKNavigationDelegate createNavigationDelegate(
           {void Function(_i4.WKWebView, String?)? didFinishNavigation,
           void Function(_i4.WKWebView, String?)? didStartProvisionalNavigation,
-          _i6.Future<_i4.WKNavigationActionPolicy> Function(
+          _i5.Future<_i4.WKNavigationActionPolicy> Function(
                   _i4.WKWebView, _i4.WKNavigationAction)?
               decidePolicyForNavigationAction,
-          void Function(_i4.WKWebView, _i8.NSError)? didFailNavigation,
-          void Function(_i4.WKWebView, _i8.NSError)?
+          void Function(_i4.WKWebView, _i7.NSError)? didFailNavigation,
+          void Function(_i4.WKWebView, _i7.NSError)?
               didFailProvisionalNavigation,
           void Function(_i4.WKWebView)?
               webViewWebContentProcessDidTerminate}) =>
@@ -631,6 +643,6 @@ class MockWebViewWidgetProxy extends _i1.Mock
                 #webViewWebContentProcessDidTerminate:
                     webViewWebContentProcessDidTerminate
               }),
-              returnValue: _FakeWKNavigationDelegate_11())
+              returnValue: _FakeWKNavigationDelegate_2())
           as _i4.WKNavigationDelegate);
 }