In Penknife, made call-with-flow-grapher validate that all its flow graphers are used exactly once.
In Penknife, made call-with-flow-grapher validate that all its flow graphers are used exactly once.

rocketnia/era,era-platform/cene,era-platform/cene,era-platform/cene,rocketnia/era,rocketnia/era,rocketnia/era-cene,rocketnia/era-cene,rocketnia/era-cene