wrap_all_children_with_expanded

Wrap all children with Expanded widget.

This assist is only available when the selected widget is a direct child of a Flex widget.
This assist will skip children that are Expanded, Flexible or Spacer.
Before
Widget build(BuildContext context) {
  return const Column(
    //   ^^^^^^^^^^^^
    children: [
      Text('Hello'),
      Spacer(),
      Text('World'),
    ],
  );
}
After
Widget build(BuildContext context) {
  return const Column(
    children: [
      Expanded(child: Text('Hello')),
      Spacer(),
      Expanded(child: Text('World')),
    ],
  );
}