def AdTag.split
import bend-osdev-aead@0.1.0.0/aead.bend as Aeadimport Base
import bend-osdev-bytes@0.1.0.0/bytes.bend as B
import bend-osdev-crypto@0.1.0.0/crypto.bend as Cr
27def AdTag.split(+tlen: Nat, +o: B.Octets) -> Result<&2, &2, Cr.CrError, AdSplit>:
28 ad.split.pick(Nat.is_lt(B.Octets.len(o), tlen), tlen, o)