lane actor#1 "worker" @6:19 families=loop#1
lane actor#2 "summarizer" @9:23
region seq#1 seq
region loop#1 loop parent=seq#1 @5:1
step ask#1 ask "worker" @6:35 lane=actor#1 region=loop#1 maybe serial
step ask#2 ask "summarizer" @9:43 lane=actor#2 region=seq#1 always
edge ask#1 -> ask#1 carry maybe
edge ask#1 -> ask#2 data maybe exact
sink ask#2
