From 32fdd5f05ccb5e615467832f76d97b824df5002a Mon Sep 17 00:00:00 2001
From: Miller Medeiros <miller@millermedeiros.com>
Date: Tue, 30 Aug 2016 15:29:50 -0700
Subject: [PATCH] Add checkpoint/rollback to ReactNativeReconcileTransaction

---
 .../native/ReactNativeReconcileTransaction.js       | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/renderers/native/ReactNativeReconcileTransaction.js b/src/renderers/native/ReactNativeReconcileTransaction.js
index ca2e5a0349667..de34a657b5dbf 100644
--- a/src/renderers/native/ReactNativeReconcileTransaction.js
+++ b/src/renderers/native/ReactNativeReconcileTransaction.js
@@ -97,6 +97,19 @@ var Mixin = {
     return ReactUpdateQueue;
   },
 
+  /**
+   * Save current transaction state -- if the return value from this method is
+   * passed to `rollback`, the transaction will be reset to that state.
+   */
+  checkpoint: function() {
+    // reactMountReady is the our only stateful wrapper
+    return this.reactMountReady.checkpoint();
+  },
+
+  rollback: function(checkpoint) {
+    this.reactMountReady.rollback(checkpoint);
+  },
+
   /**
    * `PooledClass` looks for this, and will invoke this before allowing this
    * instance to be reused.