You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: menu.rs
    path of file: ./repos/winit/src/platform_impl/macos
    
    the code of the file until where you have to start completion: use icrate::AppKit::{
    NSApplication, NSEventModifierFlagCommand, NSEventModifierFlagOption, NSEventModifierFlags,
    NSMenu, NSMenuItem,
};
use icrate::Foundation::{ns_string, MainThreadMarker, NSProcessInfo, NSString};
use objc2::rc::Id;
use objc2::runtime::Sel;
use objc2::sel;

struct KeyEquivalent<'
    
pub fn initialize(app: &NSApplication) {
    let mtm = MainThreadMarker::from(app);
    let menubar = NSMenu::new(mtm);
    let app_menu_item = NSMenuItem::new(mtm);
    menubar.addItem(&app_menu_item);

    let app_menu = NSMenu::new(mtm);
    let process_name = NSProcessInfo::processInfo().processName();

    // About menu item
    let about_item_title = ns_string!("About ").stringByAppendingString(&process_name);
    let about_item = menu_item(
        mtm,
        &about_item_title,
        Some(sel!(orderFrontStandardAboutPanel:)),
        None,
    );

    // Services menu item
    let services_menu = NSMenu::new(mtm);
    let services_item = menu_item(mtm, ns_string!("Services"), None, None);
    services_item.setSubmenu(Some(&services_menu));

    // Separator menu item
    let sep_first = NSMenuItem::separatorItem(mtm);

    // Hide application menu item
    let hide_item_title = ns_string!("Hide ").stringByAppendingString(&process_name);
    let hide_item = menu_item(
        mtm,
        &hide_item_title,
        Some(sel!(hide:)),
        Some(KeyEquivalent {
            key: ns_string!("h"),
            masks: None,
        }),
    );

    // Hide other applications menu item
    let hide_others_item_title = ns_string!("Hide Others");
    let hide_others_item = menu_item(
        mtm,
        hide_others_item_title,
        Some(sel!(hideOtherApplications:)),
        Some(KeyEquivalent {
            key: ns_string!("h"),
            masks: Some(NSEventModifierFlagOption | NSEventModifierFlagCommand),
        }),
    );

    // Show applications menu item
    let show_all_item_title = ns_string!("Show All");
    let show_all_item = menu_item(
        mtm,
        show_all_item_title,
        Some(sel!(unhideAllApplications:)),
        None,
    );

    // Separator menu item
    let sep = NSMenuItem::separatorItem(mtm);

    // Quit application menu item
    let quit_item_title = ns_string!("Quit ").stringByAppendingString(&process_name);
    let quit_item = menu_item(
        mtm,
        &quit_item_title,
        Some(sel!(terminate:)),
        Some(KeyEquivalent {
            key: ns_string!("q"),
            masks: None,
        }),
    );

    app_menu.addItem(&about_item);
    app_menu.addItem(&sep_first);
    app_menu.addItem(&services_item);
    app_menu.addItem(&hide_item);
    app_menu.addItem(&hide_others_item);
    app_menu.addItem(&show_all_item);
    app_menu.addItem(&sep);
    app_menu.addItem(&quit_item);
    app_menu_item.setSubmenu(Some(&app_menu));

    unsafe { app.setServicesMenu(Some(&services_menu)) };
    app.setMainMenu(Some(&menubar));
}