adding packages

deprecated/scaffold_tab_bar/example/lib/screens/index.dart

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+export 'screen_1.dart';
+export 'screen_2.dart';
+export 'screen_3.dart';
+export 'test.dart';

deprecated/scaffold_tab_bar/example/lib/screens/screen_1.dart

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+import 'package:flutter/material.dart';
+
+class Screen1 extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Screen 1'),
+      ),
+      body: Center(
+        child: RaisedButton(
+          child: Text('Go To Screen 1'),
+          onPressed: () {
+            Navigator.of(context)
+                .push(MaterialPageRoute(builder: (_) => Screen1()));
+            // Navigator.pushNamed(context, '/test');
+          },
+        ),
+      ),
+    );
+  }
+}

deprecated/scaffold_tab_bar/example/lib/screens/screen_2.dart

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+import 'package:flutter/material.dart';
+
+class Screen2 extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Screen 2'),
+      ),
+      body: Center(
+        child: RaisedButton(
+          child: Text('Go To Screen 2'),
+          onPressed: () {
+            Navigator.of(context)
+                .push(MaterialPageRoute(builder: (_) => Screen2()));
+          },
+        ),
+      ),
+    );
+  }
+}

deprecated/scaffold_tab_bar/example/lib/screens/screen_3.dart

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+import 'package:flutter/material.dart';
+
+class Screen3 extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Screen 3'),
+      ),
+      body: Center(
+        child: RaisedButton(
+          child: Text('Go To Screen 3'),
+          onPressed: () {
+            Navigator.of(context)
+                .push(MaterialPageRoute(builder: (_) => Screen3()));
+          },
+        ),
+      ),
+    );
+  }
+}

deprecated/scaffold_tab_bar/example/lib/screens/test.dart

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+import 'package:flutter/material.dart';
+
+class TestScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Test Screen'),
+      ),
+    );
+  }
+}