lane actor#1 "writer" @18:22
lane actor#2 "judge" @21:10 families=fanout#1
region seq#1 seq
region fanout#1 fanout parent=seq#1 @19:14 label="map"
step ask#1 ask "writer" @18:38 lane=actor#1 region=seq#1 always
step ask#2 ask "judge" @21:25 lane=actor#2 region=fanout#1 maybe stack
edge ask#1 -> ask#2 data maybe exact
sink ask#2
