The kubernetes api (more specifically the k8s apimachinery) code uses codegen in order to create code so that you can convert custom CRDs to go structures rathe

The kubernetes api (more specifically the k8s apimachinery) code uses codegen in order to create code so that you can convert custom CRDs to go structures rather than working with json. It's one of the more opaque bits of writing go code that works with k8s.