Split mapnode.go and test from types.go

kyaml/yaml/types.go

@@ -88,42 +88,6 @@ func (f FilterFunc) Filter(object *RNode) (*RNode, error) {
 	return f(object)
 }
 
-// MapNode wraps a field key and value.
-type MapNode struct {
-	Key   *RNode
-	Value *RNode
-}
-
-// IsNilOrEmpty returns true if the MapNode is nil,
-// has no value, or has a value that appears empty.
-func (mn *MapNode) IsNilOrEmpty() bool {
-	return mn == nil || mn.Value.IsNilOrEmpty()
-}
-
-type MapNodeSlice []*MapNode
-
-func (m MapNodeSlice) Keys() []*RNode {
-	var keys []*RNode
-	for i := range m {
-		if m[i] != nil {
-			keys = append(keys, m[i].Key)
-		}
-	}
-	return keys
-}
-
-func (m MapNodeSlice) Values() []*RNode {
-	var values []*RNode
-	for i := range m {
-		if m[i] != nil {
-			values = append(values, m[i].Value)
-		} else {
-			values = append(values, nil)
-		}
-	}
-	return values
-}
-
 type TypeMeta struct {
 	Kind       string
 	APIVersion string