save before flutter upgrade

lib/functions/no_transition_route.dart

@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+GoRoute noTransitionRoute(String path, String name, Widget Function(BuildContext, GoRouterState) builder, {List<GoRoute>? subroutes}) {
+  return GoRoute(
+    path: path,
+    name: name,
+    pageBuilder: (context, state) {
+      return NoTransitionPage(
+        child: builder(context, state),
+      );
+    },
+    routes: subroutes ?? [],
+  );
+}