import 'package:flutter/material.dart'; /// Created by @Haoyi on 4/14/21 class SizedSpacer extends StatelessWidget { final double? width; final double? height; const SizedSpacer({Key? key, this.width = 0, this.height = 0}) : super(key: key); @override Widget build(BuildContext context) => SizedBox(width: width, height: height); } class EmptySpacer extends SizedSpacer { const EmptySpacer({Key? key}) : super(key: key); }