fix lint

@@ -7,7 +7,7 @@ class BarcodeListScannerWithController extends StatefulWidget {
   const BarcodeListScannerWithController({Key? key}) : super(key: key);
 
   @override
-  _BarcodeListScannerWithControllerState createState() =>
+  State<BarcodeListScannerWithController> createState() =>
       _BarcodeListScannerWithControllerState();
 }
 

@@ -7,7 +7,7 @@ class BarcodeScannerWithController extends StatefulWidget {
   const BarcodeScannerWithController({Key? key}) : super(key: key);
 
   @override
-  _BarcodeScannerWithControllerState createState() =>
+  State<BarcodeScannerWithController> createState() =>
       _BarcodeScannerWithControllerState();
 }
 

@@ -6,7 +6,7 @@ class BarcodeScannerPageView extends StatefulWidget {
   const BarcodeScannerPageView({Key? key}) : super(key: key);
 
   @override
-  _BarcodeScannerPageViewState createState() => _BarcodeScannerPageViewState();
+  State<BarcodeScannerPageView> createState() => _BarcodeScannerPageViewState();
 }
 
 class _BarcodeScannerPageViewState extends State<BarcodeScannerPageView>

@@ -8,7 +8,7 @@ class BarcodeScannerReturningImage extends StatefulWidget {
   const BarcodeScannerReturningImage({Key? key}) : super(key: key);
 
   @override
-  _BarcodeScannerReturningImageState createState() =>
+  State<BarcodeScannerReturningImage> createState() =>
       _BarcodeScannerReturningImageState();
 }
 

@@ -9,7 +9,7 @@ class BarcodeScannerWithScanWindow extends StatefulWidget {
   const BarcodeScannerWithScanWindow({Key? key}) : super(key: key);
 
   @override
-  _BarcodeScannerWithScanWindowState createState() =>
+  State<BarcodeScannerWithScanWindow> createState() =>
       _BarcodeScannerWithScanWindowState();
 }
 

@@ -6,7 +6,7 @@ class BarcodeScannerWithoutController extends StatefulWidget {
   const BarcodeScannerWithoutController({Key? key}) : super(key: key);
 
   @override
-  _BarcodeScannerWithoutControllerState createState() =>
+  State<BarcodeScannerWithoutController> createState() =>
       _BarcodeScannerWithoutControllerState();
 }
 

@@ -8,7 +8,7 @@ class BarcodeScannerWithZoom extends StatefulWidget {
   const BarcodeScannerWithZoom({Key? key}) : super(key: key);
 
   @override
-  _BarcodeScannerWithZoomState createState() => _BarcodeScannerWithZoomState();
+  State<BarcodeScannerWithZoom> createState() => _BarcodeScannerWithZoomState();
 }
 
 class _BarcodeScannerWithZoomState extends State<BarcodeScannerWithZoom>