doctrine/mongodb-odm — pull request #740 by rjelierse (2014-01-05 18:55:36+00:00)
Title: [UOW] Only get change set from documentChangeSets if it exists.

This prevents notices of `Undefined index: 0000000062aacd13000000000d79d12e` in documents that use CHANGETRACKING_NOTIFY and for some reason do not have an entry in UnitOfWork::documentChangeSets.