lane actor#1 "worker" @3:16
lane actor#2 "s" @4:17
region seq#1 seq
step ask#1 ask "s" @4:28 lane=actor#2 region=seq#1 always
step ask#2 ask "worker" @7:19 lane=actor#1 region=seq#1 always
edge ask#1 -> ask#2 data always exact
sink ask#2
