namespace StoreKit
{
    [Introduced(PlatformName.WatchOS, 6, 2, PlatformArchitecture.All, null)]
    [Model]
    [Protocol]
    [Register("SKPaymentTransactionObserver", false)]
    public abstract class SKPaymentTransactionObserver : NSObject, INativeObject, ISKPaymentTransactionObserver, IDisposable
    {
        [BindingImpl(BindingImplOptions.GeneratedCode | BindingImplOptions.Optimizable)]
        [Export("paymentQueueDidChangeStorefront:")]
        [Introduced(PlatformName.MacOSX, 10, 15, PlatformArchitecture.All, null)]
        [Introduced(PlatformName.iOS, 13, 0, PlatformArchitecture.All, null)]
        [Introduced(PlatformName.TvOS, 13, 0, PlatformArchitecture.All, null)]
        public virtual void DidChangeStorefront(SKPaymentQueue! queue);
    }
}