highgroove/mm-optimistic_locking — pull request #3 by eric1234 (2012-08-29 15:02:11+00:00)
Title: Minor fix due to MongoMapper refactor which remove InstanceMethods

See this commit on MongoMapper for when this broke:
https://github.com/jnunemaker/mongomapper/commit/d2333d944ce6ae59ecab3c45e25bbed261f8180e