actor-node source
actor-node actor#1 "alpha" @5:16
actor-node actor#2 "beta" @5:49
actor-node actor#3 "merger" @10:8
actor-node sink
actor-edge source -> actor#1 exact count=1
actor-edge source -> actor#2 exact count=1
actor-edge actor#1 -> actor#3 exact count=1 types="string"
actor-edge actor#2 -> actor#3 exact count=1 types="string"
actor-edge actor#3 -> sink exact count=1 types="string"
