objc2-model-io is used at run time in 3 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) objc2-model-io version
600 2 objc2-metal-kit optional ^0.3.1
140 3 objc2-scene-kit optional ^0.3.1
130 objc2-phase optional ^0.3.1