Tootsville.Game.Gatekeeper.wtl is a function with lambda list: (gram)
Walk The Line
This is the method that Romance 2.0 uses for moving avatars in the game world.
See also: TOOTSVILLE INFINITY-WTL
There are some bookkeeping side-effects here:
These are basically part of the attempt to synchronize the client in the presence of missing information, which should not happen often.