def get_head
import bend-collections@1.0.0.0/src/containers/intrusive_links.bend as IntrusiveLinksimport Base
53def get_head(s: Links, r: U32) -> Links & Maybe<&2, U32>:
54 Links{nexts, prevs, heads} = s
55 head_got(nexts, prevs, Array.get(U32, heads, r))