actor-node actor#1 @18:19 family=fan-out#1
actor-node actor#2 @24:19 family=fan-out#2
actor-node actor#3 "c" @31:17
actor-node actor#4 "d" @35:17
actor-node sink
actor-edge actor#1 -> actor#3 exact count=1 types="string"
actor-edge actor#2 -> actor#4 exact count=1 types="string"
actor-edge actor#3 -> actor#4 exact count=1 types="string"
actor-edge actor#4 -> sink exact count=1 types="string"
