def Duration.add
import bend-time-lib@0.4.0.1/duration.bend as Durationimport Base
198def Duration.add(
199 a: Duration, b: Duration
200) -> Result<&2, &2, Duration.Error, Duration>:
201 match a b:
202 case Duration{d1, s1, n1} Duration{d2, s2, n2}:
203 Duration.add.n(d1, d2, s1, s2, n1, n2)