protected override void PackToCore(MsgPack.Packer packer, T objectTree)
{
var index = Resources.InternalCallRefHandler.Get().AddCallback(objectTree as Delegate);
var resourceNameBytes = Encoding.UTF8.GetBytes("__internal");
var delegateData = new byte[8 + resourceNameBytes.Length];
Array.Copy(BitConverter.GetBytes(index).Reverse().ToArray(), 0, delegateData, 0, 4);
Array.Copy(BitConverter.GetBytes(0).Reverse().ToArray(), 0, delegateData, 4, 4);
Array.Copy(resourceNameBytes, 0, delegateData, 8, resourceNameBytes.Length);
packer.PackExtendedTypeValue(1, delegateData);
}