Flutter:如何在一个按钮上添加两行文本？

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Button with Two Lines of Text'),
        ),
        body: Center(
          child: RaisedButton(
            onPressed: () {},
            child: Column(
              children: [
                Text(
                  'First Line',
                  style: TextStyle(fontSize: 16),
                ),
                Text(
                  'Second Line',
                  style: TextStyle(fontSize: 16),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}