def walk.apply
import emerging-ezaudio@0.4.0.0/src/mp3.bend as Mp3import Base
import emerging-ezaudio@0.4.0.0/src/mp3_dec.bend as Dec
508def walk.apply(got: Maybe<&2, Dec.Out>, +hz: U32, +ch: U32, pcm0: List<&2, U32>) -> Wk:
509 match got:
510 case None{}:
511 wk.fail(hz, ch, pcm0)
512 case Some{oo}:
513 walk.keep(oo, hz, ch, pcm0)