This function has a return type of 'Row', but doesn't end with a return statement - flutter

Question

i am trying to retrieve data from firestore as dropdown list, got this tutorial and error show up, please help, totally new with flutter.
This function has a return type of 'Row', but doesn't end with a return statement.
Try adding a return statement, or changing the return type to 'void'.
here is the code :
class _MyHomePageState extends State<MyHomePage> {
var selectedCurrency, selectedType;
final GlobalKey<FormState> _formKeyValue = new GlobalKey<FormState>();
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
leading: IconButton(
icon: Icon(
Icons.edit,
color: Colors.white,
),
onPressed: () {}),
title: Container(
alignment: Alignment.center,
child: Text("Account Details",
style: TextStyle(
color: Colors.white,
)),
),
actions: <Widget>[
IconButton(
icon: Icon(
Icons.edit,
size: 20.0,
color: Colors.white,
),
onPressed: null,
),
],
),
body: Form(
key: _formKeyValue,
autovalidate: true,
child: new ListView(
padding: const EdgeInsets.symmetric(horizontal: 15.0),
children: <Widget>[
SizedBox(height: 20.0),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Icon(
Icons.edit,
size: 25.0,
color: Color(0xff11b719),
),
SizedBox(width: 50.0),
],
),
SizedBox(height: 40.0),
StreamBuilder<QuerySnapshot>(
stream: Firestore.instance.collection("currency").snapshots(),
builder: (context, snapshot) {
}),
SizedBox(
height: 150.0,
),
Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
RaisedButton(
color: Color(0xff11b719),
textColor: Colors.white,
child: Padding(
padding: EdgeInsets.all(10.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Text("Submit", style: TextStyle(fontSize: 24.0)),
],
)),
onPressed: () {},
shape: new RoundedRectangleBorder(
borderRadius: new BorderRadius.circular(30.0))),
],
),
],
),
));
}
}

Answer 1

I'm totally new to Flutter myself, but it appears the method build of the MyHomePageState class does have a return statement. In fact, all the method body is wrapped inside that return statement:
Widget build(BuildContext context) {
return Scaffold(
...
)}
That build method returns a complete description of your page, including the Row you mentioned in your question deeply nested in structure:
return Scaffold(
...
body: Form(
...
child: new ListView(
...
children: <Widget>[
SizedBox(height: 20.0),
Row( <---------------- here it is
...
Or did I missed your point?