lane actor#1 "refiner" @19:9 families=loop#1
lane actor#2 "wrapper" @21:21
region seq#1 seq
region loop#1 loop parent=seq#1 @17:1 bound=3
step ask#1 ask "refiner" @19:26 lane=actor#1 region=loop#1 always serial
step ask#2 ask "wrapper" @21:38 lane=actor#2 region=seq#1 always
edge ask#1 -> ask#1 carry always
edge ask#1 -> ask#2 seq maybe
sink ask#2
