Начал экран успешного проведения покупки

lib/activate_token.dart

@@ -11,10 +11,6 @@ class FinishRegistrationScreen extends StatefulWidget {
 
 class _RegistrationScreenState extends BaseState<FinishRegistrationScreen> {
 
-  @override Widget build(BuildContext context) {
-    return new Scaffold(appBar: _getAppBar(), body: _getScreen(context));
-  }
-
   @override String getTitle() {
     return "Регистрация";
   }
@@ -23,11 +19,11 @@ class _RegistrationScreenState extends BaseState<FinishRegistrationScreen> {
     return 'ID merchant';
   }
 
-  @overide getMenuButtons() {
+  @overide getMenuButtons(BuildContext context) {
     return <Widget>[new IconButton(icon: new Icon(Icons.help_outline), onPressed: () {})];
   }
 
-  Widget _getScreen(BuildContext context) {
+  @override Widget _getScreenContent(BuildContext context) {
     if (textFieldValue == "") {
       _getSavedValue();
     }