final

lib/pages/plain_page.dart

@@ -13,9 +13,9 @@ import '../utils/utils.dart';
 
 class PlainPage extends StatefulWidget {
   final int businessId;
-  final String slug;
+  final String? slug;
 
-  const PlainPage(this.slug, {this.businessId, Key key}) :
+  const PlainPage(this.slug, {required this.businessId, Key? key}) :
       super(key: key);
 
   @override
@@ -23,7 +23,7 @@ class PlainPage extends StatefulWidget {
 }
 
 class PlainPageState extends State<PlainPage> {
-  Blog blog;
+  Blog? blog;
 
   @override
   Widget build(BuildContext context) {
@@ -43,10 +43,10 @@ class PlainPageState extends State<PlainPage> {
 
     return ResponsiveBuilder(
       builder: (context, sizingInformation) =>
-          ScreenTypeLayout(
-            mobile: MobilePlainPage(blog),
-            tablet: DesktopPlainPage(blog),
-            desktop: DesktopPlainPage(blog),
+          ScreenTypeLayout.builder(
+            mobile: (context) => MobilePlainPage(blog!),
+            tablet: (context) => DesktopPlainPage(blog!),
+            desktop: (context) => DesktopPlainPage(blog!),
           ),
     );
   }