title: Flutter how to use ListTile Threeline
body: <p>Flutter when I used ListTile ThreeLines, I don't know how to use ThreeLine</p>
  
  <pre><code>    import 'package:flutter/material.dart';
  
  void main() =&gt; runApp(MyApp());
  
  class MyApp extends StatelessWidget {
    // This widget is the root of your application.
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: Scaffold(
          appBar: AppBar(
            title: Text('ddd'),
          ),
          body:Container(
          child: Column(
            children: &lt;Widget&gt;[
              ListTile(
                isThreeLine: true,
                leading: Icon(Icons.event_note),
                title: Text('Title 1'),
                // subtitle: Text('Title2'),
                subtitle: Column(
  
                  children: &lt;Widget&gt;[
                    Text('Titile2'),
                    Text('Title 3'),
                    Text('Title 4'),
                    Text('and so on')
                  ],
                ),
  
              )
            ],
          ),
        ) ,
        ),
  
      );
    }
  }
  </code></pre>
  
  <p>When i delete isThreeLines, the code is Ok</p>
  
  <p><a href="https://docs.flutter.io/flutter/material/ListTile/isThreeLine.html" rel="noreferrer">ListTile</a></p>
  
  <p>Thanks</p>