kubernetes/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/schema/defaulting/prunenulls.go

func isNonNullableNonDefaultableNull(x interface{ … }

func getSchemaForField(field string, s *structuralschema.Structural) *structuralschema.Structural { … }

// PruneNonNullableNullsWithoutDefaults removes non-nullable
// non-defaultable null values from object.
//
// Non-nullable nulls that have a default are left alone here and will
// be defaulted later.
func PruneNonNullableNullsWithoutDefaults(x interface{ … }