kubernetes/staging/src/k8s.io/apiserver/pkg/cel/openapi/resolver/refs.go

// PopulateRefs recursively replaces Refs in the schema with the referred one.
// schemaOf is the callback to find the corresponding schema by the ref.
// This function will not mutate the original schema. If the schema needs to be
// mutated, a copy will be returned, otherwise it returns the original schema.
func PopulateRefs(schemaOf func(ref string) (*spec.Schema, bool), rootRef string) (*spec.Schema, error) { … }

func populateRefs(schemaOf func(ref string) (*spec.Schema, bool), visited sets.Set[string], schema *spec.Schema) (*spec.Schema, error) { … }

func refOf(schema *spec.Schema) (string, bool) { … }