The EventSourcedAggregate now provides a means to pass in a commit, apart from the event, to apply. This allows event handlers to make use of more information than before.
Note that the loader implementation needs to call the aggregate's setCurrentCommit method for the commit to appear in the event handler's arguments on the first run of the handler (non-rehydration scenario).
The aggregate will pass the commit to the handler itself during rehydration, though.