[modify] clean code
[modify] clean code

ShinjiTanimoto/shirasagi,itowtips/shirasagi,itowtips/shirasagi,MasakiInaya/shirasagi,shirasagi/ss-handson,MasakiInaya/shirasagi,shirasagi/ss-handson,sunny4381/shirasagi,mizoki/shirasagi,tany/ss,mizoki/shirasagi,ShinjiTanimoto/shirasagi,sunny4381/shirasagi,shirasagi/shirasagi,shirasagi/shirasagi,ShinjiTanimoto/shirasagi,MasakiInaya/shirasagi,tany/ss,sunny4381/shirasagi,shirasagi/shirasagi,itowtips/shirasagi,shirasagi/ss-handson,itowtips/shirasagi,ShinjiTanimoto/shirasagi,MasakiInaya/shirasagi,shirasagi/shirasagi,mizoki/shirasagi,tany/ss,mizoki/shirasagi,sunny4381/shirasagi,shirasagi/ss-handson,tany/ss