Ah, ok.  No, we don't have special serialization for sets, and it cannot by default be json-serialized, although you can just call `str` on the set for logging purposes.

A bucket is just a string, right?  Does the kazoo partition object wrap them with anything else?  If so, it may not be json serializable either.

Otherwise though, iterating over a set with a list comprehension should be the same as iterating over a list, so the `check_events_in_buckets` calls should be good.