def nat.duplicate.pair
import mylsm-lsm-store@0.6.0.1/src/transfer/Backup.bend as Backupimport Base
72def nat.duplicate.pair(value: Nat) -> Nat & Nat:
73 match value:
74 case 0n: (0n, 0n)
75 case 1n+rest: nat.duplicate.pair.step(nat.duplicate.pair(rest))