Styled widget concept

styled.dart

part 'my_widget.styled.dart'; // generated code here

// below is what user writes

@Style()
// ^^^^ provided by the library
class WidgetStyle {
  const WidgetStyle();
  
  final EdgeInsets padding => const EdgeInsets.all(8.0);
}

@Styled<WidgetStyle>
// ^^^ provided by the library
class MyWidget extends StatelessWidget {
  Widget build(BuildContext context) {
    final WidgetStyle style = context.stylesOf(this);
    //                                ^^^^^^^^ this will be provided by the library
    
    return Padding(
      padding: styles.padding,
      child: Text('hello world'),
    )
  }
}