final

lib/pages/contact_us.dart

@@ -14,7 +14,7 @@ import '../widgets/mobile/mobile_contact_us.dart';
 class ContactUs extends StatefulWidget {
   final int businessId;
 
-  const ContactUs({this.businessId, Key key}) :
+  const ContactUs({required this.businessId, Key? key}) :
       super(key: key);
 
   @override
@@ -22,7 +22,7 @@ class ContactUs extends StatefulWidget {
 }
 
 class ContactUsState extends State<ContactUs> {
-  Business business;
+  Business? business;
 
   @override
   Widget build(BuildContext context) {
@@ -42,10 +42,10 @@ class ContactUsState extends State<ContactUs> {
 
     return ResponsiveBuilder(
       builder: (context, sizingInformation) =>
-          ScreenTypeLayout(
-            mobile: MobileContactUs(business),
-            tablet: DesktopContactUs(business),
-            desktop: DesktopContactUs(business),
+          ScreenTypeLayout.builder(
+            mobile: (context) => MobileContactUs(business!),
+            tablet: (context) => DesktopContactUs(business!),
+            desktop: (context) => DesktopContactUs(business!),
           ),
     );
   }