如何在Flutter的ChildModule中传递一个值参数？

class ChildModule {
  final String value;

  ChildModule(this.value);
}

class ParentModule extends StatefulWidget {
  @override
  _ParentModuleState createState() => _ParentModuleState();
}

class _ParentModuleState extends State<ParentModule> {
  String value = "Hello";

  @override
  Widget build(BuildContext context) {
    return ChildModule(value);
  }
}

class ChildModule extends StatelessWidget {
  final String value;

  ChildModule(this.value);

  @override
  Widget build(BuildContext context) {
    return Text(value);
  }
}