def build.ver
import bend-kit-migrate@0.3.0.0/migrate.bend as Migrateimport Base
595def build.ver(m: Maybe<&2, U32>, s: Slots) -> Result<&1, &1, Error, Record>:
596 match m:
597 case None{}:
598 Fail{BadField{KVersion{}}}
599 case Some{v}:
600 build.at(v, s)