SplashScreen + первая стадия экрана регистрации

lib/main.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/material.dart';
-import 'registration.dart';
+import 'splash.dart';
 
 const String _name = "Ivan Murashov";
 
@@ -9,6 +9,17 @@ void main() {
 
 class Checker extends StatelessWidget {
   @override Widget build(BuildContext context) {
-    return new MaterialApp(title: "DemoApp", home: new RegistrationScreen());
+    return new MaterialApp(title: "DemoApp", home: new SplashScreen());
+  }
+}
+
+abstract class BaseState<T> extends State<StatefulWidget> {
+
+  void faq() {
+
+  }
+
+  void logout() {
+
   }
 }