lane actor#1 "ghost" @4:22
lane actor#2 "worker" @5:20
region seq#1 seq
region branch#1 branch parent=seq#1 @4:16 label="unused"
step ask#1 ask "ghost" @4:37 lane=actor#1 region=branch#1 maybe
step ask#2 ask "worker" @5:36 lane=actor#2 region=seq#1 always
edge ask#2 -> ask#1 seq maybe
sink ask#2
