def Duration.add.n
import bend-time-lib@0.4.0.1/duration.bend as Durationimport Base
192def Duration.add.n(
193 +d1: U32, +d2: U32, +s1: U32, +s2: U32, +n1: U32, +n2: U32
194) -> Result<&2, &2, Duration.Error, Duration>:
195 +ns = U32.add(n1, n2)
196 Duration.add.n2(d1, d2, s1, s2, ns, U32.is_ge(ns, 1000000000))