def lane
import bend-collections@1.0.0.0/src/crypto/argon2/argon2.bend as Argon2import Base
import bend-collections@1.0.0.0/src/crypto/blake/blake2b/types.bend as T
import bend-collections@1.0.0.0/src/crypto/argon2/types.bend as A
129# Lane n (0 <= n < 128) of a block.
130def lane(+b: A.Block, +n: Nat) -> T.Lane:
131 at(row_at(b, Nat.div(n, 16n)), Nat.mod(n, 16n))