Indoor facilities

[RILAX]

Watching the end of the first OT of the DePaul Dayton B-Ball game got me thinking: Is the roof out of bound in lacrosse if it is played in a dome facility? Reading the rulebook it seems to only talk about out of bounds in relations to the boundary lines or objects outside the boundary lines, but I could be missing something.

Never had thought about this before as all of the facilities I have been at are outdoor and if there was an indoor facility it would almost have to be able to handle football, which means the roof somewhat tall (hopefully).