def cmp.head
import bend-osdev-mode-core@0.1.0.0/PROOF.bend as PROOFimport Base
import bend-osdev-mode-core@0.1.0.0/mode_core.bend as M
628def cmp.head(d: M.CmBlock, xs: List<&2, M.CmBlock>) -> M.CmBlock:
629 match xs:
630 case Nil{}:
631 d
632 case Con{h, t}:
633 h