There is no more SafeInterval, instead Intervals can be constructed with a RunQueue to use for expiring.
PresentsDObjectMgr implements RunQueue.
Client has a getRunQueue() method to get the client side RunQueue.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@3283 542714f4-19e9-0310-aa3c-eee0fc999fb1
and we want to prevent them from being added twice.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1284 542714f4-19e9-0310-aa3c-eee0fc999fb1