ensure class is not nil
ensure class is not nil

eanagel/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,steveram/AsyncDisplayKit,maicki/AsyncDisplayKit,yufenglv/AsyncDisplayKit,dskatz22/AsyncDisplayKit,ppamorim/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,flovouin/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,eeeyes/AsyncDisplayKit,owenwuef/AsyncDisplayKit,hbucius/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,JetZou/AsyncDisplayKit,paulyoung/AsyncDisplayKit,jflinter/AsyncDisplayKit,marmelroy/AsyncDisplayKit,Teino1978-Corp/Teino1978-Corp-AsyncDisplayKit,lappp9/AsyncDisplayKit,gazreese/AsyncDisplayKit,hejunbinlan/AsyncDisplayKit,RuiAAPeres/AsyncDisplayKit,rcancro/AsyncDisplayKit,bimawa/AsyncDisplayKit,facebook/AsyncDisplayKit,romyilano/AsyncDisplayKit,ppamorim/AsyncDisplayKit,hbucius/AsyncDisplayKit,hejunbinlan/AsyncDisplayKit,facebook/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,dvan001/AsyncDisplayKit,rcancro/AsyncDisplayKit,rmls/AsyncDisplayKit,levi/AsyncDisplayKit,gazreese/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,mtxs007/AsyncDisplayKit,wangjiangwen/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,lappp9/AsyncDisplayKit,21451061/AsyncDisplayKit,george-gw/AsyncDisplayKit,rmls/AsyncDisplayKit,marmelroy/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,dvan001/AsyncDisplayKit,programming086/AsyncDisplayKit,george-gw/AsyncDisplayKit,bimawa/AsyncDisplayKit,adamdahan/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,gazreese/AsyncDisplayKit,rcancro/AsyncDisplayKit,meitianapp/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,maicki/AsyncDisplayKit,smyrgl/AsyncDisplayKit,Xinchi/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,flovouin/AsyncDisplayKit,yufenglv/AsyncDisplayKit,dskatz22/AsyncDisplayKit,Xinchi/AsyncDisplayKit,Teino1978-Corp/Teino1978-Corp-AsyncDisplayKit,maicki/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,nivanchikov/AsyncDisplayKit,meitianapp/AsyncDisplayKit,dskatz22/AsyncDisplayKit,romyilano/AsyncDisplayKit,todotodoo/AsyncDisplayKit,harryworld/AsyncDisplayKit,wangjiangwen/AsyncDisplayKit,owenwuef/AsyncDisplayKit,levi/AsyncDisplayKit,eanagel/AsyncDisplayKit,JetZou/AsyncDisplayKit,todotodoo/AsyncDisplayKit,steveram/AsyncDisplayKit,samhsiung/AsyncDisplayKit,levi/AsyncDisplayKit,Xinchi/AsyncDisplayKit,levi/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,tharhtet/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,steveram/AsyncDisplayKit,eanagel/AsyncDisplayKit,rmls/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,RuiAAPeres/AsyncDisplayKit,benzguo/AsyncDisplayKit,adamdahan/AsyncDisplayKit,paulyoung/AsyncDisplayKit,meitianapp/AsyncDisplayKit,programming086/AsyncDisplayKit,tharhtet/AsyncDisplayKit,harryworld/AsyncDisplayKit,benzguo/AsyncDisplayKit,jflinter/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,samhsiung/AsyncDisplayKit,21451061/AsyncDisplayKit,tharhtet/AsyncDisplayKit,maicki/AsyncDisplayKit,nivanchikov/AsyncDisplayKit,dskatz22/AsyncDisplayKit,hejunbinlan/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,eeeyes/AsyncDisplayKit,flovouin/AsyncDisplayKit,eanagel/AsyncDisplayKit,flovouin/AsyncDisplayKit,programming086/AsyncDisplayKit,21451061/AsyncDisplayKit,Xinchi/AsyncDisplayKit,bimawa/AsyncDisplayKit,steveram/AsyncDisplayKit,smyrgl/AsyncDisplayKit,Teino1978-Corp/Teino1978-Corp-AsyncDisplayKit,codepython/AsyncDisplayKit,eeeyes/AsyncDisplayKit,RuiAAPeres/AsyncDisplayKit,paulyoung/AsyncDisplayKit,smyrgl/AsyncDisplayKit,rmls/AsyncDisplayKit,owenwuef/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,Teino1978-Corp/Teino1978-Corp-AsyncDisplayKit,TheoJL/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,Cen92/AsyncDisplayKit,adamdahan/AsyncDisplayKit,Cen92/AsyncDisplayKit,TheoJL/AsyncDisplayKit,samhsiung/AsyncDisplayKit,dvan001/AsyncDisplayKit,JetZou/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,RuiAAPeres/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,ppamorim/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,yufenglv/AsyncDisplayKit,nivanchikov/AsyncDisplayKit,dvan001/AsyncDisplayKit,harryworld/AsyncDisplayKit,paulyoung/AsyncDisplayKit,paulyoung/AsyncDisplayKit,flovouin/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,Teino1978-Corp/Teino1978-Corp-AsyncDisplayKit,rahul-malik/AsyncDisplayKit,jflinter/AsyncDisplayKit,gazreese/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,mtxs007/AsyncDisplayKit,facebook/AsyncDisplayKit,TheoJL/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,george-gw/AsyncDisplayKit,harryworld/AsyncDisplayKit,lappp9/AsyncDisplayKit,smyrgl/AsyncDisplayKit,romyilano/AsyncDisplayKit,codepython/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,jflinter/AsyncDisplayKit,marmelroy/AsyncDisplayKit,eanagel/AsyncDisplayKit,wangjiangwen/AsyncDisplayKit,tharhtet/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,lappp9/AsyncDisplayKit,facebook/AsyncDisplayKit,wangjiangwen/AsyncDisplayKit,todotodoo/AsyncDisplayKit,george-gw/AsyncDisplayKit,mtxs007/AsyncDisplayKit,dskatz22/AsyncDisplayKit,owenwuef/AsyncDisplayKit,yufenglv/AsyncDisplayKit,benzguo/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,mtxs007/AsyncDisplayKit,TheoJL/AsyncDisplayKit,harryworld/AsyncDisplayKit,maicki/AsyncDisplayKit,Cen92/AsyncDisplayKit,eeeyes/AsyncDisplayKit,Xinchi/AsyncDisplayKit,codepython/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,hbucius/AsyncDisplayKit,levi/AsyncDisplayKit,adamdahan/AsyncDisplayKit,Cen92/AsyncDisplayKit,JetZou/AsyncDisplayKit,rcancro/AsyncDisplayKit,codepython/AsyncDisplayKit,todotodoo/AsyncDisplayKit,hbucius/AsyncDisplayKit,marmelroy/AsyncDisplayKit,JetZou/AsyncDisplayKit,rcancro/AsyncDisplayKit,21451061/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,programming086/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,nivanchikov/AsyncDisplayKit,meitianapp/AsyncDisplayKit,samhsiung/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,benzguo/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,bimawa/AsyncDisplayKit,ppamorim/AsyncDisplayKit,RuiAAPeres/AsyncDisplayKit,yufenglv/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,programming086/AsyncDisplayKit,nivanchikov/AsyncDisplayKit,rmls/AsyncDisplayKit,romyilano/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,hejunbinlan/AsyncDisplayKit