Move kv loader code to public package.

pkg/types/kustomization.go

@@ -182,12 +182,6 @@ type PluginConfig struct {
 	Enabled bool
 }
 
-// Pair is a key value pair.
-type Pair struct {
-	Key   string
-	Value string
-}
-
 type PluginType string
 
 func (p PluginType) IsUndefined() bool {

pkg/types/kvpairsources.go

@@ -3,7 +3,7 @@
 
 package types
 
-// KvPairSources contains some generic sources for generators.
+// KvPairSources defines places to obtain key value pairs.
 type KvPairSources struct {
 	// LiteralSources is a list of literal
 	// pair sources. Each literal source should

pkg/types/pair.go

@@ -0,0 +1,10 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package types
+
+// Pair is a key value pair.
+type Pair struct {
+	Key   string
+	Value string
+}