use gpui::*; struct SetMenus; impl Render for SetMenus {    fn render(&mut self, _cx: &mut ViewContext<Self>) -> impl IntoElement {        div()            .flex()            .bg(rgb(0x2e7d32))            .size_full()            .justify_center()            .items_center()            .text_xl()            .text_color(rgb(0xffffff))            .child("Set Menus Example")    }} fn main() {    App::new().run(|cx: &mut AppContext| {        // Bring the menu bar to the foreground (so you can see the menu bar)        cx.activate(true);        // Register the `quit` function so it can be referenced by the `MenuItem::action` in the menu bar        cx.on_action(quit);        // Add menu items        cx.set_menus(vec![Menu {            name: "set_menus".into(),            items: vec![MenuItem::action("Quit", Quit)],        }]);        cx.open_window(WindowOptions::default(), |cx| {            cx.new_view(|_cx| SetMenus {})        })        .unwrap();    });} // Associate actions using the `actions!` macro (or `impl_actions!` macro)actions!(set_menus, [Quit]); // Define the quit function that is registered with the AppContextfn quit(_: &Quit, cx: &mut AppContext) {    println!("Gracefully quitting the application . . .");    cx.quit();}