[modify] clean code
[modify] clean code

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