refactor: use Traceable

packages/pinball_components/sandbox/lib/stories/boundaries/boundaries_game.dart

@@ -1,13 +1,10 @@
 import 'package:flame/extensions.dart';
-import 'package:flame_forge2d/flame_forge2d.dart';
 import 'package:pinball_components/pinball_components.dart';
 import 'package:sandbox/common/common.dart';
 import 'package:sandbox/stories/ball/basic_ball_game.dart';
 
-class BoundariesGame extends BasicBallGame {
-  BoundariesGame({
-    required this.trace,
-  }) : super(color: const Color(0xFFFF0000));
+class BoundariesGame extends BasicBallGame with Traceable {
+  BoundariesGame() : super(color: const Color(0xFFFF0000));
 
   static const info = '''
     Shows how Boundaries are rendered.
@@ -16,8 +13,6 @@ class BoundariesGame extends BasicBallGame {
     - Tap anywhere on the screen to spawn a ball into the game.
 ''';
 
-  final bool trace;
-
   @override
   Future<void> onLoad() async {
     await super.onLoad();
@@ -29,12 +24,6 @@ class BoundariesGame extends BasicBallGame {
       ..followVector2(Vector2.zero())
       ..zoom = 6;
 
-    final bottomBoundary = children.whereType<BodyComponent>().first;
-    final outerBoundary = children.whereType<BodyComponent>().last;
-
-    if (trace) {
-      bottomBoundary.trace();
-      outerBoundary.trace();
-    }
+    await traceAllBodies();
   }
 }

packages/pinball_components/sandbox/lib/stories/boundaries/stories.dart

@@ -7,9 +7,7 @@ void addBoundariesStories(Dashbook dashbook) {
   dashbook.storiesOf('Boundaries').add(
         'Basic',
         (context) => GameWidget(
-          game: BoundariesGame(
-            trace: context.boolProperty('Trace', true),
-          ),
+          game: BoundariesGame()..trace = context.boolProperty('Trace', true),
         ),
         codeLink: buildSourceLink('boundaries_game/basic.dart'),
         info: BoundariesGame.info,