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