def ver.pre
import ezx@1.11.0.0/src/git/git.bend as Gitimport Base
625def ver.pre(+xs: List<&2, Nat>, ps: Maybe<&2, List<&2, Id>>) -> Ver:
626 match ps:
627 case None{}:
628 No{}
629 case Some{ys}:
630 ver.yes(List.is_empty(&2, Nat, xs), xs, ys)