def key_known
import cli@0.2.0.0/cli.bend as Cliimport Base
2666# Whether keys hold one named query, read without copying the key.
2667def key_known(+keys: List<&2, OptKey>, +query: String) -> Bool:
2668 hit = head_named(keys, query)
2669 Maybe.is_some(&2, Nat, key_rank(keys, query, 0n, hit))