[NewGroupChatScreen] Maintain selectedUsersList when going back and forward in the flow

example/lib/group_chat_details_screen.dart

@@ -53,7 +53,12 @@ class _GroupChatDetailsScreenState extends State<GroupChatDetailsScreen> {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
+    return WillPopScope(
+      onWillPop: () async {
+        Navigator.pop(context, _selectedUsers);
+        return false;
+      },
+      child: Scaffold(
         backgroundColor: Color.fromRGBO(252, 252, 252, 1),
         appBar: AppBar(
           elevation: 1,
@@ -205,7 +210,7 @@ class _GroupChatDetailsScreenState extends State<GroupChatDetailsScreen> {
                           _selectedUsers.remove(user);
                         });
                         if (_selectedUsers.isEmpty) {
-                        Navigator.pop(context);
+                          Navigator.pop(context, _selectedUsers);
                         }
                       },
                     ),
@@ -215,6 +220,7 @@ class _GroupChatDetailsScreenState extends State<GroupChatDetailsScreen> {
             ),
           ],
         ),
+      ),
     );
   }
 }

example/lib/new_group_chat_screen.dart

@@ -69,8 +69,8 @@ class _NewGroupChatScreenState extends State<NewGroupChatScreen> {
                 StreamIcons.arrow_right,
                 color: Color(0xFF006CFF),
               ),
-              onPressed: () {
+              onPressed: () async {
-                Navigator.push(
+                final updatedList = await Navigator.push(
                   context,
                   MaterialPageRoute(
                     builder: (_) => GroupChatDetailsScreen(
@@ -78,6 +78,13 @@ class _NewGroupChatScreenState extends State<NewGroupChatScreen> {
                     ),
                   ),
                 );
+                if (updatedList != null) {
+                  setState(() {
+                    _selectedUsers
+                      ..clear()
+                      ..addAll(updatedList);
+                  });
+                }
               },
             )
         ],

lib/src/back_button.dart

@@ -33,7 +33,7 @@ class StreamBackButton extends StatelessWidget {
               if (onPressed != null) {
                 onPressed();
               } else {
-                Navigator.of(context).pop();
+                Navigator.maybePop(context);
               }
             },
             child: Icon(