actor-node source
actor-node actor#1 "勘察员" @14:22
actor-node hole#21b40fca/actor#1 "分组员" @16:23
actor-node actor#2 "执行者" @20:8
actor-node sink
actor-edge source -> actor#1 exact count=1
actor-edge actor#1 -> hole#21b40fca/actor#1 exact count=1 types="Survey"
actor-edge hole#21b40fca/actor#1 -> actor#2 exact count=1 types="Plan"
actor-edge actor#2 -> sink exact count=1 types="string"
