Open End Drawer in Flutter - Cambiar nombre al archivo como main.dart

openEndDrawer.dart

///Cambiar nombre al archivo como main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  final GlobalKey<ScaffoldState> _scaffoldKey = GlobalKey<ScaffoldState>();

  void _openEndDrawer() {
    _scaffoldKey.currentState.openEndDrawer();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        key: _scaffoldKey,
        appBar: AppBar(
          title: Text('Drawer Demo'),
          actions: [
            IconButton(icon: Icon(Icons.person), onPressed: _openEndDrawer)
          ],
        ),
        body: Center(
          child: ElevatedButton(
            onPressed: _openEndDrawer,
            child: Text('Open End Drawer'),
          ),
        ),
        endDrawer: Drawer(
          child: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                const Text('This is the Drawer'),
                ElevatedButton(
                  onPressed: () {},
                  child: const Text('Close Drawer'),
                ),
              ],
            ),
          ),
        ),

        // Disable opening the end drawer with a swipe gesture.
        endDrawerEnableOpenDragGesture: false,
      ),
    );
  }
}