Update for Flutter 3.10 beta (#1746)

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] All existing and new tests are passing.

---------

Co-authored-by: David Iglesias <ditman@gmail.com>
Co-authored-by: Mark Thompson <2554588+MarkTechson@users.noreply.github.com>
Co-authored-by: John Ryan <ryjohn@google.com>

place_tracker/lib/place_details.dart

@@ -272,9 +272,9 @@ class _Reviews extends StatelessWidget {
                     color: Colors.grey,
                   ),
                 ),
-                child: Row(
+                child: const Row(
                   mainAxisAlignment: MainAxisAlignment.center,
-                  children: const [
+                  children: [
                     Text(
                       '5',
                       style: TextStyle(

place_tracker/lib/place_list.dart

@@ -64,17 +64,11 @@ class _CategoryButton extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    late String buttonText;
-    switch (category) {
-      case PlaceCategory.favorite:
-        buttonText = 'Favorites';
-        break;
-      case PlaceCategory.visited:
-        buttonText = 'Visited';
-        break;
-      case PlaceCategory.wantToGo:
-        buttonText = 'Want To Go';
-    }
+    final buttonText = switch (category) {
+      PlaceCategory.favorite => 'Favorites',
+      PlaceCategory.visited => 'Visited',
+      PlaceCategory.wantToGo => 'Want To Go'
+    };
 
     return Container(
       margin: const EdgeInsets.symmetric(vertical: 12.0),

place_tracker/lib/place_map.dart

@@ -401,21 +401,16 @@ class _PlaceMapState extends State<PlaceMap> {
   }
 
   static Future<BitmapDescriptor> _getPlaceMarkerIcon(
-      BuildContext context, PlaceCategory category) async {
-    switch (category) {
-      case PlaceCategory.favorite:
-        return BitmapDescriptor.fromAssetImage(
+          BuildContext context, PlaceCategory category) =>
+      switch (category) {
+        PlaceCategory.favorite => BitmapDescriptor.fromAssetImage(
             createLocalImageConfiguration(context, size: const Size.square(32)),
-            'assets/heart.png');
-      case PlaceCategory.visited:
-        return BitmapDescriptor.fromAssetImage(
+            'assets/heart.png'),
+        PlaceCategory.visited => BitmapDescriptor.fromAssetImage(
             createLocalImageConfiguration(context, size: const Size.square(32)),
-            'assets/visited.png');
-      case PlaceCategory.wantToGo:
-      default:
-        return BitmapDescriptor.defaultMarker;
-    }
-  }
+            'assets/visited.png'),
+        PlaceCategory.wantToGo => Future.value(BitmapDescriptor.defaultMarker),
+      };
 
   static List<Place> _getPlacesForCategory(
       PlaceCategory category, List<Place> places) {

place_tracker/lib/place_tracker_app.dart

@@ -67,9 +67,9 @@ class _PlaceTrackerHomePage extends StatelessWidget {
     var state = Provider.of<AppState>(context);
     return Scaffold(
       appBar: AppBar(
-        title: Row(
+        title: const Row(
           crossAxisAlignment: CrossAxisAlignment.center,
-          children: const [
+          children: [
             Padding(
               padding: EdgeInsets.fromLTRB(0.0, 0.0, 8.0, 0.0),
               child: Icon(Icons.pin_drop, size: 24.0),

place_tracker/pubspec.yaml

@@ -4,7 +4,7 @@ description: A new Flutter project.
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.19.5 <4.0.0'
+  sdk: ^3.0.0-0
 
 dependencies:
   flutter: