namespace AppKit
{
    [Register("NSApplication", true)]
    [SupportedOSPlatform("macos")]
    [UnsupportedOSPlatform("maccatalyst")]
    public class NSApplication : NSResponder, INSAccessibility, INSAccessibilityElementProtocol, INSAppearanceCustomization, INSMenuItemValidation, INSUserInterfaceValidations, INativeObject, IDisposable
    {
        public static class Notifications
        {
            public static NSObject! ObserveWillTerminate(NSObject! objectToObserve, EventHandler<NSNotificationEventArgs!>! handler);
        }
    }
}