petgraph-gen is used at run time in 3 crates. It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) petgraph-gen version
280 chidori-debugger ^0.1.3
110 echo-state-network ^0.1
memoesu ^0.1.3
110 grapher dev ^0.1.3
graph-canon dev ^0.1.3