Try migrate other elements [Learning]

src/window.blp

@@ -2,8 +2,30 @@ using Gtk 4.0;
 using Adw 1;
 
 template TutorialWindow : Adw.ApplicationWindow {
+  title: _("My Application");
   default-width: 800;
   default-height: 600;
+
+  Adw.ToolbarView {
+
+    [top]
+    Adw.HeaderBar header_bar {
+
+
+      [end]
+      Gtk.MenuButton {
+        menu-model: primary_menu;
+        primary: True;
+        icon: "open-menu-symbolic";
+        tooltip-text: _("Menu");
+      }
+    }
+
+    Gtk.Label {
+      styles ["title-1"]
+      label: "Hello, World!";
+    }
+  }
 }
 
 menu primary_menu {