https://blog.faceutil.com/2017/10/16/wlauncher-%ec%8a%a4%ed%83%80%eb%a7%b5%ed%95%b5%ea%b0%90%ec%a7%80%ea%b8%b0-wlauncher-%eb%8b%a4%ec%9a%b4%eb%a1%9c%eb%93%9c-%eb%b0%8f-%ec%82%ac%ec%9a%a9%eb%b2%95-%ec%b4%9d%ec%a0%95%eb%a6%ac-%ce%bf/