namespace System
{
    public sealed class TimeZoneInfo : IEquatable<TimeZoneInfo?>, IDeserializationCallback, ISerializable
    {
        public sealed class AdjustmentRule : IEquatable<AdjustmentRule?>, IDeserializationCallback, ISerializable
        {
            public override bool Equals([NotNullWhen(true)] object? obj);
        }
    }
}