@optshiftk @cdespinosa Aha. I thought he was talking about like in Mail where you get an app-specific Time Machine interface.
@cdespinosa Would be nice to have some public API for that sort of thing.
@VTPG @Catfish_Man And presumably lots of other abstractions that you would need macros for in other languages.
@jimcorreia For yes/no/error or yes/no/not-computed-yet.