diff --git a/iter/iter.go b/iter/iter.go
index fb5a66f..3be099d 100644
--- a/iter/iter.go
+++ b/iter/iter.go
@@ -5,22 +5,22 @@ import (
 	"github.com/ipld/go-ipld-prime"
 )
 
-// PBLinkItr behaves like an list of links iterator, even thought the HAMT behavior is more complicated
-type PBLinkItr interface {
+// pbLinkItr behaves like an list of links iterator, even thought the HAMT behavior is more complicated
+type pbLinkItr interface {
 	Next() (int64, dagpb.PBLink, error)
 	Done() bool
 }
 
 type TransformNameFunc func(dagpb.String) dagpb.String
 
-func NewUnixFSDirMapIterator(itr PBLinkItr, transformName TransformNameFunc) ipld.MapIterator {
+func NewUnixFSDirMapIterator(itr pbLinkItr, transformName TransformNameFunc) ipld.MapIterator {
 	return &UnixFSDir__MapItr{itr, transformName}
 }
 
 // UnixFSDir__MapItr throught the links as if they were a map
 // Note: for now it does return links with no name, where the key is just String("")
 type UnixFSDir__MapItr struct {
-	_substrate    PBLinkItr
+	_substrate    pbLinkItr
 	transformName TransformNameFunc
 }
 
@@ -53,11 +53,11 @@ func (itr *UnixFSDir__MapItr) Done() bool {
 }
 
 type UnixFSDir__Itr struct {
-	_substrate    PBLinkItr
+	_substrate    pbLinkItr
 	transformName TransformNameFunc
 }
 
-func NewUnixFSDirIterator(itr PBLinkItr, transformName TransformNameFunc) *UnixFSDir__Itr {
+func NewUnixFSDirIterator(itr pbLinkItr, transformName TransformNameFunc) *UnixFSDir__Itr {
 	return &UnixFSDir__Itr{itr, transformName}
 }
 func (itr *UnixFSDir__Itr) Next() (k dagpb.String, v dagpb.Link) {