Confine calls to ApplyToJSON.

api/internal/accumulator/namereferencetransformer.go

@@ -9,7 +9,6 @@ import (
 	"sigs.k8s.io/kustomize/api/filters/nameref"
 	"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
 	"sigs.k8s.io/kustomize/api/resmap"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
 )
 
 type nameReferenceTransformer struct {
@@ -84,12 +83,12 @@ func (o *nameReferenceTransformer) Transform(m resmap.ResMap) error {
 					if candidates == nil {
 						candidates = m.SubsetThatCouldBeReferencedByResource(referrer)
 					}
-					err := filtersutil.ApplyToJSON(nameref.Filter{
+					err := referrer.ApplyFilter(nameref.Filter{
 						FieldSpec:          fSpec,
 						Referrer:           referrer,
 						Target:             target.Gvk,
 						ReferralCandidates: candidates,
-					}, referrer)
+					})
 					if err != nil {
 						return err
 					}

api/internal/accumulator/refvartransformer.go

@@ -9,7 +9,6 @@ import (
 	"sigs.k8s.io/kustomize/api/filters/refvar"
 	"sigs.k8s.io/kustomize/api/resmap"
 	"sigs.k8s.io/kustomize/api/types"
-	"sigs.k8s.io/kustomize/kyaml/filtersutil"
 )
 
 type refVarTransformer struct {
@@ -50,10 +49,10 @@ func (rv *refVarTransformer) Transform(m resmap.ResMap) error {
 		rv.replacementCounts, rv.varMap)
 	for _, res := range m.Resources() {
 		for _, fieldSpec := range rv.fieldSpecs {
-			err := filtersutil.ApplyToJSON(refvar.Filter{
+			err := res.ApplyFilter(refvar.Filter{
 				MappingFunc: rv.mappingFunc,
 				FieldSpec:   fieldSpec,
-			}, res)
+			})
 			if err != nil {
 				return err
 			}

api/internal/wrappy/wnode.go

@@ -43,6 +43,10 @@ func FromRNode(node *yaml.RNode) *WNode {
 	return &WNode{node: node}
 }
 
+func (wn *WNode) AsRNode() *yaml.RNode {
+	return wn.node
+}
+
 func (wn *WNode) demandMetaData(label string) yaml.ResourceMeta {
 	meta, err := wn.node.GetMeta()
 	if err != nil {