Add @pragma('vm:entry-point') to RestorableRouteBuilder arguments (#118738)

examples/api/lib/cupertino/route/show_cupertino_dialog.0.dart

@@ -41,6 +41,7 @@ class CupertinoDialogExample extends StatelessWidget {
     );
   }
 
+  @pragma('vm:entry-point')
   static Route<Object?> _dialogBuilder(
       BuildContext context, Object? arguments) {
     return CupertinoDialogRoute<void>(

examples/api/lib/cupertino/route/show_cupertino_modal_popup.0.dart

@@ -41,6 +41,7 @@ class ModalPopupExample extends StatelessWidget {
     );
   }
 
+  @pragma('vm:entry-point')
   static Route<void> _modalBuilder(BuildContext context, Object? arguments) {
     return CupertinoModalPopupRoute<void>(
       builder: (BuildContext context) {

examples/api/lib/material/date_picker/show_date_picker.0.dart

@@ -53,6 +53,7 @@ class _MyStatefulWidgetState extends State<MyStatefulWidget>
     },
   );
 
+  @pragma('vm:entry-point')
   static Route<DateTime> _datePickerRoute(
     BuildContext context,
     Object? arguments,

examples/api/lib/material/date_picker/show_date_range_picker.0.dart

@@ -74,6 +74,7 @@ class _MyStatefulWidgetState extends State<MyStatefulWidget>
         _restorableDateRangePickerRouteFuture, 'date_picker_route_future');
   }
 
+  @pragma('vm:entry-point')
   static Route<DateTimeRange?> _dateRangePickerRoute(
     BuildContext context,
     Object? arguments,

examples/api/lib/material/dialog/show_dialog.2.dart

@@ -38,6 +38,7 @@ class DialogExample extends StatelessWidget {
     );
   }
 
+  @pragma('vm:entry-point')
   static Route<Object?> _dialogBuilder(
       BuildContext context, Object? arguments) {
     return DialogRoute<void>(

examples/api/lib/widgets/navigator/navigator.restorable_push.0.dart

@@ -30,6 +30,7 @@ class MyStatefulWidget extends StatefulWidget {
 }
 
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+  @pragma('vm:entry-point')
   static Route<void> _myRouteBuilder(BuildContext context, Object? arguments) {
     return MaterialPageRoute<void>(
       builder: (BuildContext context) => const MyStatefulWidget(),

examples/api/lib/widgets/navigator/navigator.restorable_push_and_remove_until.0.dart

@@ -30,6 +30,7 @@ class MyStatefulWidget extends StatefulWidget {
 }
 
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+  @pragma('vm:entry-point')
   static Route<void> _myRouteBuilder(BuildContext context, Object? arguments) {
     return MaterialPageRoute<void>(
       builder: (BuildContext context) => const MyStatefulWidget(),

examples/api/lib/widgets/navigator/navigator.restorable_push_replacement.0.dart

@@ -30,6 +30,7 @@ class MyStatefulWidget extends StatefulWidget {
 }
 
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+  @pragma('vm:entry-point')
   static Route<void> _myRouteBuilder(BuildContext context, Object? arguments) {
     return MaterialPageRoute<void>(
       builder: (BuildContext context) => const MyStatefulWidget(),

examples/api/lib/widgets/navigator/navigator_state.restorable_push.0.dart

@@ -30,6 +30,7 @@ class MyStatefulWidget extends StatefulWidget {
 }
 
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+  @pragma('vm:entry-point')
   static Route<void> _myRouteBuilder(BuildContext context, Object? arguments) {
     return MaterialPageRoute<void>(
       builder: (BuildContext context) => const MyStatefulWidget(),

examples/api/lib/widgets/navigator/navigator_state.restorable_push_and_remove_until.0.dart

@@ -30,6 +30,7 @@ class MyStatefulWidget extends StatefulWidget {
 }
 
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+  @pragma('vm:entry-point')
   static Route<void> _myRouteBuilder(BuildContext context, Object? arguments) {
     return MaterialPageRoute<void>(
       builder: (BuildContext context) => const MyStatefulWidget(),

examples/api/lib/widgets/navigator/navigator_state.restorable_push_replacement.0.dart

@@ -30,6 +30,7 @@ class MyStatefulWidget extends StatefulWidget {
 }
 
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
+  @pragma('vm:entry-point')
   static Route<void> _myRouteBuilder(BuildContext context, Object? arguments) {
     return MaterialPageRoute<void>(
       builder: (BuildContext context) => const MyStatefulWidget(),

examples/api/lib/widgets/navigator/restorable_route_future.0.dart

@@ -73,6 +73,7 @@ class _MyHomeState extends State<MyHome> with RestorationMixin {
 
   // A static `RestorableRouteBuilder` that can re-create the route during
   // state restoration.
+  @pragma('vm:entry-point')
   static Route<int> _counterRouteBuilder(
       BuildContext context, Object? arguments) {
     return MaterialPageRoute<int>(

examples/api/lib/widgets/routes/show_general_dialog.0.dart

@@ -38,6 +38,7 @@ class GeneralDialogExample extends StatelessWidget {
     );
   }
 
+  @pragma('vm:entry-point')
   static Route<Object?> _dialogBuilder(
       BuildContext context, Object? arguments) {
     return RawDialogRoute<void>(

packages/flutter/lib/src/widgets/navigator.dart

@@ -55,8 +55,9 @@ typedef RouteListFactory = List<Route<dynamic>> Function(NavigatorState navigato
 ///
 /// Used by the restorable methods of the [Navigator] that add anonymous routes
 /// (e.g. [NavigatorState.restorablePush]). For this use case, the
-/// [RestorableRouteBuilder] must be static function as the [Navigator] will
-/// call it again during state restoration to re-create the route.
+/// [RestorableRouteBuilder] must be static function annotated with
+/// `@pragma('vm:entry-point')`. The [Navigator] will call it again during
+/// state restoration to re-create the route.
 typedef RestorableRouteBuilder<T> = Route<T> Function(BuildContext context, Object? arguments);
 
 /// Signature for the [Navigator.popUntil] predicate argument.
@@ -2108,9 +2109,10 @@ class Navigator extends StatefulWidget {
   /// {@macro flutter.widgets.navigator.push}
   ///
   /// {@template flutter.widgets.Navigator.restorablePush}
-  /// The method takes a _static_ [RestorableRouteBuilder] as argument, which
-  /// must instantiate and return a new [Route] object that will be added to
-  /// the navigator. The provided `arguments` object is passed to the
+  /// The method takes a [RestorableRouteBuilder] as argument, which must be a
+  /// _static_ function annotated with `@pragma('vm:entry-point')`. It must
+  /// instantiate and return a new [Route] object that will be added to the
+  /// navigator. The provided `arguments` object is passed to the
   /// `routeBuilder`. The navigator calls the static `routeBuilder` function
   /// again during state restoration to re-create the route object.
   ///

packages/flutter/test/cupertino/dialog_test.dart

@@ -1566,6 +1566,7 @@ Widget createAppWithCenteredButton(Widget child) {
 class _RestorableDialogTestWidget extends StatelessWidget {
   const _RestorableDialogTestWidget();
 
+  @pragma('vm:entry-point')
   static Route<Object?> _dialogBuilder(BuildContext context, Object? arguments) {
     return CupertinoDialogRoute<void>(
       context: context,

packages/flutter/test/cupertino/route_test.dart

@@ -2314,6 +2314,7 @@ class _TestPostRouteCancelState extends State<_TestPostRouteCancel> {
 class _RestorableModalTestWidget extends StatelessWidget {
   const _RestorableModalTestWidget();
 
+  @pragma('vm:entry-point')
   static Route<void> _modalBuilder(BuildContext context, Object? arguments) {
     return CupertinoModalPopupRoute<void>(
       builder: (BuildContext context) {

packages/flutter/test/material/date_picker_test.dart

@@ -1412,6 +1412,7 @@ class _RestorableDatePickerDialogTestWidgetState extends State<_RestorableDatePi
     }
   }
 
+  @pragma('vm:entry-point')
   static Route<DateTime> _datePickerRoute(
     BuildContext context,
     Object? arguments,

packages/flutter/test/material/date_range_picker_test.dart

@@ -1150,6 +1150,7 @@ class _RestorableDateRangePickerDialogTestWidgetState extends State<_RestorableD
     }
   }
 
+  @pragma('vm:entry-point')
   static Route<DateTimeRange?> _dateRangePickerRoute(
     BuildContext context,
     Object? arguments,

packages/flutter/test/material/dialog_test.dart

@@ -2710,6 +2710,7 @@ void main() {
 class _RestorableDialogTestWidget extends StatelessWidget {
   const _RestorableDialogTestWidget();
 
+  @pragma('vm:entry-point')
   static Route<Object?> _materialDialogBuilder(BuildContext context, Object? arguments) {
     return DialogRoute<void>(
       context: context,

packages/flutter/test/material/time_picker_test.dart

@@ -1628,6 +1628,7 @@ class _TimePickerLauncherState extends State<_TimePickerLauncher> with Restorati
     },
   );
 
+  @pragma('vm:entry-point')
   static Route<TimeOfDay> _timePickerRoute(
     BuildContext context,
     Object? arguments,

packages/flutter/test/widgets/navigator_restoration_test.dart

@@ -1015,6 +1015,7 @@ void main() {
   });
 }
 
+@pragma('vm:entry-point')
 Route<void> _routeBuilder(BuildContext context, Object? arguments) {
   return MaterialPageRoute<void>(
     builder: (BuildContext context) {
@@ -1025,6 +1026,7 @@ Route<void> _routeBuilder(BuildContext context, Object? arguments) {
   );
 }
 
+@pragma('vm:entry-point')
 Route<void> _routeFutureBuilder(BuildContext context, Object? arguments) {
   return MaterialPageRoute<void>(
     builder: (BuildContext context) {

packages/flutter/test/widgets/routes_test.dart

@@ -2153,6 +2153,7 @@ class WidgetWithNoLocalHistoryState extends State<WidgetWithNoLocalHistory> {
 class _RestorableDialogTestWidget extends StatelessWidget {
   const _RestorableDialogTestWidget();
 
+  @pragma('vm:entry-point')
   static Route<Object?> _dialogBuilder(BuildContext context, Object? arguments) {
     return RawDialogRoute<void>(
       pageBuilder: (