Tooltip with Challenge Mode stats

[necroskillz]

Hi,

I've been wondering about this for a while now. While there some things you can set for a link before you put it in a tooltip that modify something (like normal/hc/mythic version), making the item display as though you were in a challenge mode dungeon is not among them.

Does anybody have an idea about how blizzard does this? How do I specify that I want a challenge mode version of the item in the tooltip?