What is the "Look" Type in rblxthumb?

I’ve been making player icons for my game using RblxThumb, and when i type a RblxThumb Type, it prints a list of all Types in the console.
I looked through the list and a found a Type named “Look”, and i’m curious for what it is used for.

Does anybody know what it’s for? It’s not even documented on in the Assets documentation

It could be something that they haven’t implemented yet, or they simply made an error, it’s not in the documentation, so it must be hidden, or they haven’t added it officially yet.