flutter，如何将条形码和二维码包装在同一个容器中？

dependencies:
  barcode_scan: ^3.0.0

import 'package:barcode_scan/barcode_scan.dart';
import 'package:flutter/material.dart';

FlatButton(
  onPressed: () async {
    var result = await BarcodeScanner.scan();
    print(result.rawContent);
  },
  child: Text('Scan Barcode/QR Code'),
),

Container(
  padding: EdgeInsets.all(16.0),
  child: FlatButton(
    onPressed: () async {
      var result = await BarcodeScanner.scan();
      print(result.rawContent);
    },
    child: Text('Scan Barcode/QR Code'),
  ),
),