Making Future Calls In Flutter Futurebuilder Widget

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

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

class MyApp extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomePage(),
    );
  }
}

class HomePage extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Sample Divider Widget',
      home: HomePageState(),
    );
  }
}

class HomePageState extends StatefulWidget {
  HomePageState({Key key}) : super(key: key);

  @override
  _FutureBuilderWidgetState createState() => _FutureBuilderWidgetState();
}

Future getDataFromFuture()
async {
  return new Future.delayed(const Duration(seconds: 1), ()=>"Wait is over!");
}

class _FutureBuilderWidgetState extends State {

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text("Sample FutureBuilder Widget"),
          backgroundColor: Colors.blue[900],
        ),
        body: Center(
          child:Column(
            children: [
              Container(child: Image.network(
                  "https://franklinchristianchurch.com/wp-content/uploads/2017/11/Waiting_web.jpg"),),
              SizedBox(height: 30,),
              FutureBuilder(
                  future: getDataFromFuture(),
                  builder: (context, snapshot){
                    if(snapshot.data != null)
                    {
                      return Center(
                        child: Text(snapshot.data,
                          style: TextStyle(
                              color: Colors.blue[900],
                              fontSize: 40.0,
                              fontWeight: FontWeight.bold
                          ),),);
                    }
                    return CircularProgressIndicator();
                  })
            ],
          ),
        )
    );
  }
}