namespace Foundation
{
    [DefaultMember("Item")]
    [Register("NSOrderedSet", true)]
    public class NSOrderedSet : NSObject, INSCoding, INSCopying, INSMutableCopying, INSSecureCoding, INativeObject, IEnumerable, IEnumerable<NSObject>, IDisposable
    {
        [BindingImpl(BindingImplOptions.GeneratedCode | BindingImplOptions.Optimizable)]
        [Export("indexOfObject:")]
        public virtual nint IndexOf(NSObject! obj);
    }
}