parent method
Applies a parent to a child
final parentWidget = ({required Widget child}) => Styled.widget(child: child)
  .alignment(Alignment.center)
final childWidget = Text('some text')
  .padding(all: 10)
Widget build(BuildContext) => childWidget
  .parent(parentWidget);
Implementation
Widget parent(Widget Function({required Widget child}) parent) =>
    parent(child: this);