Variable Declared:
  Widget text=Text("Hello World")
class Type:

class NewText extends StatelessWidget {
  const NewText({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const Text("Hello World");
  }
}

flutter变量声明的小部件与类声明的小部件之间有任何差异。我需要原因