def Period.find
import bend-kit-migrate@0.3.0.0/migrate.bend as Migrateimport Base
291def Period.find(+t: Tag) -> Maybe<&2, Period>:
292 Bool.pick(Maybe<&2, Period>, Tag.eq(Period.tag(Monthly{}), t), Some{Monthly{}}, Bool.pick(Maybe<&2, Period>, Tag.eq(Period.tag(Yearly{}), t), Some{Yearly{}}, None{}))