From 60900f483761a89943ff4fd72729c281cf0a06b0 Mon Sep 17 00:00:00 2001
From: Toby Zerner <toby.zerner@gmail.com>
Date: Mon, 4 May 2015 10:43:40 +0930
Subject: [PATCH] Ability to clear a retained subtree

---
 framework/core/js/lib/utils/subtree-retainer.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/framework/core/js/lib/utils/subtree-retainer.js b/framework/core/js/lib/utils/subtree-retainer.js
index 154a8a56b..b6e99e318 100644
--- a/framework/core/js/lib/utils/subtree-retainer.js
+++ b/framework/core/js/lib/utils/subtree-retainer.js
@@ -11,7 +11,7 @@
  */
 export default class SubtreeRetainer {
   constructor() {
-    this.old = [];
+    this.clear();
     this.callbacks = [].slice.call(arguments);
   }
 
@@ -30,4 +30,8 @@ export default class SubtreeRetainer {
   add() {
     this.callbacks = this.callbacks.concat([].slice.call(arguments));
   }
+
+  clear() {
+    this.old = [];
+  }
 }