phase phase#1 "摸底" @13:1
phase phase#2 "执行" @16:1
lane main
lane actor#1 "勘察员" @14:22
lane actor#2 "执行者" @17:20
region seq#1 seq
step ask#1 ask "勘察员" @14:35 lane=actor#1 phase=phase#1 region=seq#1 always
step hole#21b40fca hole "决定分组" @15:20 lane=main phase=phase#1 region=seq#1 always
step ask#2 ask "执行者" @17:33 lane=actor#2 phase=phase#2 region=seq#1 always
edge ask#1 -> hole#21b40fca data always exact
edge hole#21b40fca -> ask#2 data always exact
phase-edge phase#1 -> phase#2 data always
sink ask#2
