How To Create Navigation Drawer With Expansion Tile In Flutter

import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  MyHomePageState createState() {
    return new MyHomePageState();
  }
}

class MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
  static final List<String> _listViewData = [
    "Bajarangisoft.com",
    "Flutter",
    "Android",
    "iOS",
    "React Native",
    "Php",
    "Core Java",
    "Laravel",
    "Javascript",
    "Jquery",
    "Python",
  ];

  List<ExpansionTile> _listOfExpansions = List<ExpansionTile>.generate(
      11,
          (i) => ExpansionTile(
            title: Text("Expansion $i",
            style: TextStyle(color: Colors.blue[800]),
            ),
           children: _listViewData
            .map((data) => ListTile(
            leading: Icon(Icons.person),
            title: Text(data),
            subtitle: Text("a subtitle here"),
         ))
            .toList(),
      ));

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.blue[800],
        title: Text("ExpansionTile Drawer"),
      ),
      drawer: Container(
        width: 200,
        child: Drawer(
          child: ListView(
            padding: EdgeInsets.all(8.0),
            children:
            _listOfExpansions.map((expansionTile) => expansionTile).toList(),
          ),
        ),
      ),
      body: Center(
        child: Text('Main Body'),
      ),
    );
  }
}