From 637f0b3ee14ffed369b182526f2c499aff6f4446 Mon Sep 17 00:00:00 2001
From: Masayuki Tanaka <masayuki0812@mac.com>
Date: Wed, 3 Jul 2013 14:15:04 +0900
Subject: [PATCH] Fix groups, regions interface

---
 c3.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/c3.js b/c3.js
index 7f3b01e..aee898f 100644
--- a/c3.js
+++ b/c3.js
@@ -1577,14 +1577,17 @@
         }
 
         c3.groups = function (groups) {
-            if (typeof groups !== 'undefined')  __data_groups = groups
+            if (typeof groups === 'undefined') return __data_groups
+            __data_groups = groups
             redraw(true, true, true)
+            return __data_groups
         }
 
         c3.regions = function (regions) {
             if (typeof regions === 'undefined') return __regions
             __regions = regions
             redraw(true, true, true)
+            return __regions
         }
         c3.regions.add = function (regions) {
             if (typeof regions === 'undefined') return __regions