lane actor#1 "worker" @21:16
lane actor#2 "consumer" @26:17
region seq#1 seq
step ask#1 ask "worker" @23:10 lane=actor#1 region=seq#1 always
step ask#2 ask "worker" @24:10 lane=actor#1 region=seq#1 always
step ask#3 ask "consumer" @26:35 lane=actor#2 region=seq#1 always
edge ask#1 -> ask#2 fifo always
edge ask#1 -> ask#3 data always exact
edge ask#2 -> ask#3 data always exact
sink ask#3
