Update details_screen.dart

MainAppDMT/lib/screens/details/details_screen.dart

@@ -6,9 +6,9 @@ import '../../constants.dart';
 import 'components/body.dart';
 
 class DetailsScreen extends StatelessWidget {
-  final Product product;
+  final Product product;//procuct.dart
 
-  const DetailsScreen({Key key, this.product}) : super(key: key);
+  const DetailsScreen({Key key, this.product}) : super(key: key);//constant
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -26,14 +26,14 @@ class DetailsScreen extends StatelessWidget {
       elevation: 0,
       leading: IconButton(
         padding: EdgeInsets.only(left: kDefaultPadding),
-        icon: SvgPicture.asset("assets/icons/back.svg"),
+        icon: SvgPicture.asset("assets/icons/back.svg"),//add icon from assets
         onPressed: () {
           Navigator.pop(context);
         },
       ),
       centerTitle: false,
       title: Text(
-        'Back'.toUpperCase(),
+        'Back'.toUpperCase(),//back 
         style: Theme.of(context).textTheme.bodyText2,
       ),
       actions: <Widget>[