how to use RouterComponent, if I want to save some State - flame

Question

here is my Character class:
class Character extends Component {
bool isMoving = false;
...
}
here is for instance Forge2DGame class:
class MainGame extends Forge2DGame {
...
Character character; //<-- here I thought I can create an instance and get the value later for other class
#override
Future<void> onLoad() async {
add(
router = RouterComponent(
initialRoute: 'character',
routes: {
'character': Route(character), //<-- here is my question
},
),
);
}
}
and now I want to get character movement Data for Scene class, like this?
class Scene extends Component with HasGameRef<MainGame> {
...
bool characterMovement = gameRef.character.isMoving;
}
So my questions is:
if I use like tutorial showed Route(Character.new), does it mean, everytime there will be a new instance, so the Scene class can not get the value from instantiated character?Or how to achieve my expectation?
I got the error:
This requires the 'constructor-tearoffs' language feature to be enabled. Try updating your pubspec.yaml to set the minimum SDK constraint to 2.15.0 or higher, and running 'pub get'.
Since I am using sdk: ">=2.11.0 <3.0.0" (I didnt want to use null safety for now), can I still use RouterComponent?
Thanks!
===========================UPDATE===========================
hi Spydon, thanks for the reply, Can I use RouterComponent like this? So I can get the same value from instantiated character, or what is the right solution, I think I didnt find a reference from docs.
class MainGame extends Forge2DGame {
...
Character character;
#override
Future<void> onLoad() async {
add(
router = RouterComponent(
initialRoute: 'character',
routes: {
'character': Route( () => character),
},
),
);
}
}

Answer 1

It will only instantiate a new instance every time if you send in maintainState = false to the Route constructor.
If you can't use a higher SDK (which I highly recommend since Dart 3 will make nullsafety mandatory) or if you don't want to use constructor tear-offs you just have to create a lamda that creates the object, this is the same thing:
Route(() => Character());