import 'package:flutter/material.dart'; class LimitDemo extends StatelessWidget { @override Widget build(BuildContext context) { return new Scaffold( appBar: new AppBar( title: new Text('LimitedBox test') ), body: new Block( children: <Widget>[ new LimitedBox( maxWidth: 100.0, maxHeight: 100.0, child: new Container( decoration: new BoxDecoration(backgroundColor: const Color(0xFF00FF00)) ) ) ] ) ); } }