How to present an empty view in flutter?

For anyone like me who was wondering what is “the correct way” to show an empty widget – official Material codebase uses this:

Widget build(BuildContext context) {
  return SizedBox.shrink();
}

SizedBox.shrink() is a widget that is unlike Container or Material has no background or any decorations whatsoever. It sizes itself to the smallest area possible, if not influenced by parent constraints.