anchor.diff:  import 'package:pinball/game/components/components.dart';
   
   /// {@template wall}
  -///
  -/// A generic wall component, a static component that can
  -/// be used to create more complex structures.
  -///
  +/// A continuos generic and [BodyType.static] barrier that divides a game area.
   /// {@endtemplate}
   class Wall extends BodyComponent {
     Wall({
  
positive.code: }
  
  /// {@template bottom_wall}
  ///
  /// An specifc [Wall] used to create bottom boundary of the
  /// game board
  ///
  /// {@endtemplate}
  class BottomWall extends Wall {
    BottomWall(Forge2DGame game)
  
negative.code: }
  
  /// {@template bottom_wall_ball_contact_callback}
  /// Listens when a [Ball] falls into a [BottomWall].
  /// {@endtemplate}
  class BottomWallBallContactCallback extends ContactCallback<Ball, BottomWall> {
    @override
  