tree f691eee1744d3bef0645a7cb53298d361e3270ec
parent 375f4be24a2b1bf84114d254a6e03965d9a604b6
author sangyun-han <sangyun0628@khu.ac.kr> 1459303866 +0900
committer sangyun-han <sangyun0628@khu.ac.kr> 1459303866 +0900

Add comment in GroupOperation for javadoc

Change-Id: Idef516e9e7af3d8fdb94ba3d13da8bb614e12c55