actor-node source
actor-node actor#1 "scan" @3:20
actor-node actor#2 "plan" @8:8
actor-node sink
actor-edge source -> actor#1 exact count=1
actor-edge actor#1 -> actor#2 exact count=1 types="Record<string, string>"
actor-edge actor#2 -> sink exact count=1 types="string"
