Questions on setArmThreadPlayOnce

In the script code for realm wars is a function, "setArmThreadPlayOnce", and what it seems to do is play an animation sequence on top of any current ones (so for example you could swing an axe while running). But this function isn't included in the normal SDK. Does anyone know anything about this function, maybe where I can find a copy of it?

Thanks!

EDIT: Blah, my apologies, I didn't realize we were allowed to download the source code for the game.