unit's public API.
handleResult() and handleFailure() could also be protected but we're adapting
Invoker.Unit to something that appears to provide a different (persistence
friendly) public API even though the invoker doesn't actually call it, but
rather the normal Unit public methods call the new public methods. But we still
want to maintain the "feel" of these being the PersistingUnit's "main thing.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4839 542714f4-19e9-0310-aa3c-eee0fc999fb1
Michael Bayne