public override void WriteBinary(ESPWriter writer)
        {
            Marker.WriteBinary(writer);

            if (Idle != null)
            {
                Idle.WriteBinary(writer);
            }
            if (Script != null)
            {
                Script.WriteBinary(writer);
            }
            if (Topic != null)
            {
                Topic.WriteBinary(writer);
            }
        }