New API class how to use?

So i was messing with studio and found a lot of new stuff in the add new object tab, i found a whole new api class and i have been trying to figure out how they work and if they work at all does anyone know how they work???

http://wiki.roblox.com/index.php?title=API:Class/Constraint

script.Parent.PartA.RopeConstraint.Attachment0 = script.Parent.PartA.A
script.Parent.PartA.RopeConstraint.Attachment1 = script.Parent.PartB.B

Roblox has yet not released these API due to the iOS version of Roblox not being caught up to the latest version, or the feature is incomplete and still in development.