A lot of the expensive getters were transformed into cached properties
instead. A lot of things that were properties were transformed into
properties as well.
It probably isn't good to rely on an item that was added to a list to
still be the last item, especially if we could have other async
coroutines modify the list. This may not be an actual issue, but having
the function explicitly return the object that it just added to the list
should guarantee that we don't accidentally pull the wrong item from the
end of the list later.
