namespace Microsoft.AspNetCore.Owin
{
    public class OwinEnvironment : ICollection<KeyValuePair<string, object>>, IDictionary<string, object>, IEnumerable, IEnumerable<KeyValuePair<string, object>>
    {
        public class FeatureMap<TFeature> : FeatureMap
        {
            public FeatureMap(Func<TFeature, object> getter, Func<object> defaultFactory, Action<TFeature, object> setter);
        }
    }
}