_DescriptionMixIn is gone. indexedRecordsFromMatchExpression() now returns a frozenset to avoid having the index mutated on accident.
_DescriptionMixIn is gone.
indexedRecordsFromMatchExpression() now returns a frozenset to avoid having the index mutated on accident.


git-svn-id: 81e381228600e5752b80483efd2b45b26c451ea2@10664 e27351fd-9f3e-4f54-a53b-843176b1656c

trevor/calendarserver,trevor/calendarserver,trevor/calendarserver