Future with then and showing a null return type

future_with_then.dart

void main() {
  final myFuture = _runTheFuture();
  print('myFuture.runtimeType: ${myFuture.runtimeType}');
}

_runTheFuture() {
  print('print statement before invoking the future');

  Future.delayed(Duration(seconds: 2), () {
    print('Future completed!');
    return 12;
  }).then((myValue) => print('Future value: $myValue'));
}