Refactoring code.
Refactoring code.


Former-commit-id: 5cecadf92ca7464852b6f24f8ba2261e21ad71dd
yingjunwu/peloton,haojin2/peloton,apavlo/peloton,seojungmin/peloton,AngLi-Leon/peloton,vittvolt/15721-peloton,PauloAmora/peloton,vittvolt/15721-peloton,PauloAmora/peloton,apavlo/peloton,malin1993ml/peloton,haojin2/peloton,phisiart/peloton-p3,wangziqi2016/peloton,ShuxinLin/peloton,yingjunwu/peloton,seojungmin/peloton,vittvolt/15721-peloton,jessesleeping/iso_peloton,AngLi-Leon/peloton,prashasthip/peloton,vittvolt/15721-peloton,jessesleeping/iso_peloton,vittvolt/peloton,jessesleeping/iso_peloton,malin1993ml/peloton,eric-haibin-lin/peloton-1,AllisonWang/peloton,haojin2/peloton,vittvolt/peloton,malin1993ml/peloton,vittvolt/peloton,AngLi-Leon/peloton,jessesleeping/iso_peloton,jessesleeping/iso_peloton,AllisonWang/peloton,eric-haibin-lin/peloton-1,vittvolt/peloton,yingjunwu/peloton,cmu-db/peloton,eric-haibin-lin/peloton-1,apavlo/peloton,ShuxinLin/peloton,PauloAmora/peloton,vittvolt/15721-peloton,haojin2/peloton,wangziqi2016/peloton,malin1993ml/peloton,cmu-db/peloton,malin1993ml/peloton,AngLi-Leon/peloton,prashasthip/peloton,prashasthip/peloton,yingjunwu/peloton,wangziqi2016/peloton,PauloAmora/peloton,jessesleeping/iso_peloton,PauloAmora/peloton,phisiart/peloton-p3,malin1993ml/peloton,ShuxinLin/peloton,eric-haibin-lin/peloton-1,prashasthip/peloton,ShuxinLin/peloton,seojungmin/peloton,cmu-db/peloton,wangziqi2016/peloton,jessesleeping/iso_peloton,AllisonWang/peloton,haojin2/peloton,cmu-db/peloton,AngLi-Leon/peloton,vittvolt/peloton,AngLi-Leon/peloton,AllisonWang/peloton,cmu-db/peloton,phisiart/peloton-p3,AllisonWang/peloton,AllisonWang/peloton,wangziqi2016/peloton,vittvolt/peloton,eric-haibin-lin/peloton-1,cmu-db/peloton,PauloAmora/peloton,vittvolt/15721-peloton,ShuxinLin/peloton,phisiart/peloton-p3,seojungmin/peloton,eric-haibin-lin/peloton-1,prashasthip/peloton,prashasthip/peloton,phisiart/peloton-p3,seojungmin/peloton,phisiart/peloton-p3,haojin2/peloton,seojungmin/peloton,wangziqi2016/peloton,yingjunwu/peloton,apavlo/peloton,apavlo/peloton,yingjunwu/peloton,apavlo/peloton,ShuxinLin/peloton