add missing base class
add missing base class

PeterFaiman/ruby-grpc-minimal,thinkerou/grpc,msmania/grpc,rjshade/grpc,malexzx/grpc,zhimingxie/grpc,murgatroid99/grpc,miselin/grpc,yugui/grpc,tengyifei/grpc,yongni/grpc,matt-kwong/grpc,soltanmm-google/grpc,kumaralokgithub/grpc,matt-kwong/grpc,simonkuang/grpc,apolcyn/grpc,ppietrasa/grpc,msmania/grpc,firebase/grpc,firebase/grpc,Vizerai/grpc,perumaalgoog/grpc,andrewpollock/grpc,tamihiro/grpc,thinkerou/grpc,yang-g/grpc,ejona86/grpc,greasypizza/grpc,deepaklukose/grpc,dgquintas/grpc,ppietrasa/grpc,ctiller/grpc,royalharsh/grpc,grpc/grpc,sreecha/grpc,ctiller/grpc,wcevans/grpc,msmania/grpc,firebase/grpc,rjshade/grpc,geffzhang/grpc,adelez/grpc,a11r/grpc,MakMukhi/grpc,a-veitch/grpc,arkmaxim/grpc,ejona86/grpc,kskalski/grpc,ctiller/grpc,VcamX/grpc,leifurhauks/grpc,soltanmm/grpc,Crevil/grpc,matt-kwong/grpc,yugui/grpc,philcleveland/grpc,grani/grpc,soltanmm-google/grpc,sreecha/grpc,fuchsia-mirror/third_party-grpc,dgquintas/grpc,bogdandrutu/grpc,ctiller/grpc,fuchsia-mirror/third_party-grpc,philcleveland/grpc,kpayson64/grpc,rjshade/grpc,royalharsh/grpc,hstefan/grpc,nicolasnoble/grpc,grpc/grpc,goldenbull/grpc,thinkerou/grpc,pszemus/grpc,jtattermusch/grpc,Crevil/grpc,daniel-j-born/grpc,ipylypiv/grpc,jcanizales/grpc,makdharma/grpc,apolcyn/grpc,andrewpollock/grpc,makdharma/grpc,thinkerou/grpc,baylabs/grpc,podsvirov/grpc,sreecha/grpc,thunderboltsid/grpc,carl-mastrangelo/grpc,podsvirov/grpc,Vizerai/grpc,pszemus/grpc,jtattermusch/grpc,murgatroid99/grpc,kriswuollett/grpc,nicolasnoble/grpc,ctiller/grpc,matt-kwong/grpc,jtattermusch/grpc,jcanizales/grpc,deepaklukose/grpc,dgquintas/grpc,ppietrasa/grpc,soltanmm/grpc,wcevans/grpc,dklempner/grpc,msmania/grpc,bogdandrutu/grpc,andrewpollock/grpc,ncteisen/grpc,msmania/grpc,chrisdunelm/grpc,rjshade/grpc,kpayson64/grpc,a-veitch/grpc,msmania/grpc,greasypizza/grpc,grpc/grpc,yugui/grpc,grpc/grpc,fuchsia-mirror/third_party-grpc,vjpai/grpc,yongni/grpc,makdharma/grpc,soltanmm-google/grpc,vjpai/grpc,dklempner/grpc,LuminateWireless/grpc,stanley-cheung/grpc,tengyifei/grpc,carl-mastrangelo/grpc,miselin/grpc,hstefan/grpc,PeterFaiman/ruby-grpc-minimal,andrewpollock/grpc,tengyifei/grpc,podsvirov/grpc,ncteisen/grpc,thinkerou/grpc,podsvirov/grpc,ejona86/grpc,stanley-cheung/grpc,royalharsh/grpc,yongni/grpc,ananthonline/grpc,jcanizales/grpc,simonkuang/grpc,zhimingxie/grpc,ctiller/grpc,mehrdada/grpc,kskalski/grpc,quizlet/grpc,murgatroid99/grpc,kskalski/grpc,ipylypiv/grpc,grani/grpc,MakMukhi/grpc,dgquintas/grpc,vjpai/grpc,daniel-j-born/grpc,grpc/grpc,grpc/grpc,stanley-cheung/grpc,tamihiro/grpc,tengyifei/grpc,quizlet/grpc,y-zeng/grpc,thunderboltsid/grpc,ipylypiv/grpc,a-veitch/grpc,carl-mastrangelo/grpc,jtattermusch/grpc,soltanmm-google/grpc,philcleveland/grpc,podsvirov/grpc,LuminateWireless/grpc,goldenbull/grpc,jboeuf/grpc,jtattermusch/grpc,adelez/grpc,arkmaxim/grpc,matt-kwong/grpc,grani/grpc,greasypizza/grpc,greasypizza/grpc,baylabs/grpc,kskalski/grpc,y-zeng/grpc,Crevil/grpc,leifurhauks/grpc,chrisdunelm/grpc,chrisdunelm/grpc,pszemus/grpc,daniel-j-born/grpc,matt-kwong/grpc,MakMukhi/grpc,yongni/grpc,tengyifei/grpc,hstefan/grpc,arkmaxim/grpc,ipylypiv/grpc,ejona86/grpc,LuminateWireless/grpc,7anner/grpc,vjpai/grpc,vsco/grpc,y-zeng/grpc,kumaralokgithub/grpc,y-zeng/grpc,thunderboltsid/grpc,vsco/grpc,pszemus/grpc,adelez/grpc,mehrdada/grpc,apolcyn/grpc,podsvirov/grpc,donnadionne/grpc,murgatroid99/grpc,royalharsh/grpc,goldenbull/grpc,ncteisen/grpc,7anner/grpc,infinit/grpc,grpc/grpc,grani/grpc,podsvirov/grpc,jboeuf/grpc,VcamX/grpc,y-zeng/grpc,a-veitch/grpc,leifurhauks/grpc,stanley-cheung/grpc,carl-mastrangelo/grpc,fuchsia-mirror/third_party-grpc,jboeuf/grpc,deepaklukose/grpc,LuminateWireless/grpc,dklempner/grpc,vjpai/grpc,apolcyn/grpc,royalharsh/grpc,soltanmm/grpc,Crevil/grpc,perumaalgoog/grpc,MakMukhi/grpc,geffzhang/grpc,grpc/grpc,nicolasnoble/grpc,murgatroid99/grpc,yang-g/grpc,rjshade/grpc,donnadionne/grpc,matt-kwong/grpc,geffzhang/grpc,pszemus/grpc,MakMukhi/grpc,Vizerai/grpc,VcamX/grpc,muxi/grpc,7anner/grpc,yugui/grpc,perumaalgoog/grpc,ctiller/grpc,jtattermusch/grpc,murgatroid99/grpc,sreecha/grpc,carl-mastrangelo/grpc,yongni/grpc,Crevil/grpc,jtattermusch/grpc,pmarks-net/grpc,soltanmm/grpc,apolcyn/grpc,kpayson64/grpc,Vizerai/grpc,tamihiro/grpc,zhimingxie/grpc,pmarks-net/grpc,apolcyn/grpc,kriswuollett/grpc,chrisdunelm/grpc,muxi/grpc,firebase/grpc,jtattermusch/grpc,a-veitch/grpc,kumaralokgithub/grpc,geffzhang/grpc,deepaklukose/grpc,vsco/grpc,kpayson64/grpc,miselin/grpc,nicolasnoble/grpc,rjshade/grpc,greasypizza/grpc,leifurhauks/grpc,arkmaxim/grpc,malexzx/grpc,wcevans/grpc,yugui/grpc,grpc/grpc,grani/grpc,yugui/grpc,pszemus/grpc,geffzhang/grpc,sreecha/grpc,tamihiro/grpc,Vizerai/grpc,bogdandrutu/grpc,wcevans/grpc,Crevil/grpc,a11r/grpc,ejona86/grpc,matt-kwong/grpc,kumaralokgithub/grpc,soltanmm/grpc,baylabs/grpc,7anner/grpc,simonkuang/grpc,Vizerai/grpc,yang-g/grpc,fuchsia-mirror/third_party-grpc,miselin/grpc,ejona86/grpc,jtattermusch/grpc,hstefan/grpc,simonkuang/grpc,muxi/grpc,tengyifei/grpc,simonkuang/grpc,vsco/grpc,wcevans/grpc,thunderboltsid/grpc,pmarks-net/grpc,thunderboltsid/grpc,kskalski/grpc,yang-g/grpc,perumaalgoog/grpc,arkmaxim/grpc,kpayson64/grpc,leifurhauks/grpc,a11r/grpc,yang-g/grpc,quizlet/grpc,grani/grpc,murgatroid99/grpc,miselin/grpc,greasypizza/grpc,tamihiro/grpc,baylabs/grpc,dklempner/grpc,sreecha/grpc,a11r/grpc,miselin/grpc,malexzx/grpc,deepaklukose/grpc,deepaklukose/grpc,chrisdunelm/grpc,MakMukhi/grpc,ejona86/grpc,infinit/grpc,baylabs/grpc,makdharma/grpc,miselin/grpc,ctiller/grpc,muxi/grpc,soltanmm/grpc,makdharma/grpc,yongni/grpc,chrisdunelm/grpc,perumaalgoog/grpc,baylabs/grpc,vjpai/grpc,a11r/grpc,a11r/grpc,Crevil/grpc,philcleveland/grpc,daniel-j-born/grpc,thunderboltsid/grpc,ppietrasa/grpc,kpayson64/grpc,nicolasnoble/grpc,quizlet/grpc,a-veitch/grpc,LuminateWireless/grpc,quizlet/grpc,7anner/grpc,quizlet/grpc,thunderboltsid/grpc,muxi/grpc,malexzx/grpc,andrewpollock/grpc,murgatroid99/grpc,adelez/grpc,ppietrasa/grpc,wcevans/grpc,perumaalgoog/grpc,rjshade/grpc,7anner/grpc,carl-mastrangelo/grpc,tengyifei/grpc,ananthonline/grpc,jboeuf/grpc,donnadionne/grpc,muxi/grpc,dklempner/grpc,ppietrasa/grpc,ctiller/grpc,y-zeng/grpc,kskalski/grpc,infinit/grpc,ananthonline/grpc,greasypizza/grpc,stanley-cheung/grpc,a11r/grpc,carl-mastrangelo/grpc,kriswuollett/grpc,dgquintas/grpc,jcanizales/grpc,firebase/grpc,mehrdada/grpc,PeterFaiman/ruby-grpc-minimal,firebase/grpc,tamihiro/grpc,yang-g/grpc,vsco/grpc,nicolasnoble/grpc,makdharma/grpc,carl-mastrangelo/grpc,malexzx/grpc,carl-mastrangelo/grpc,kriswuollett/grpc,rjshade/grpc,infinit/grpc,nicolasnoble/grpc,grpc/grpc,zhimingxie/grpc,yang-g/grpc,pszemus/grpc,PeterFaiman/ruby-grpc-minimal,mehrdada/grpc,daniel-j-born/grpc,ananthonline/grpc,ncteisen/grpc,ppietrasa/grpc,dklempner/grpc,vjpai/grpc,muxi/grpc,fuchsia-mirror/third_party-grpc,tamihiro/grpc,infinit/grpc,grpc/grpc,jcanizales/grpc,jtattermusch/grpc,quizlet/grpc,andrewpollock/grpc,baylabs/grpc,yang-g/grpc,andrewpollock/grpc,malexzx/grpc,thunderboltsid/grpc,thunderboltsid/grpc,mehrdada/grpc,soltanmm-google/grpc,daniel-j-born/grpc,wcevans/grpc,ananthonline/grpc,hstefan/grpc,dgquintas/grpc,dklempner/grpc,VcamX/grpc,soltanmm-google/grpc,msmania/grpc,jcanizales/grpc,stanley-cheung/grpc,vsco/grpc,pszemus/grpc,nicolasnoble/grpc,miselin/grpc,apolcyn/grpc,yugui/grpc,thinkerou/grpc,rjshade/grpc,pmarks-net/grpc,sreecha/grpc,soltanmm/grpc,simonkuang/grpc,mehrdada/grpc,msmania/grpc,adelez/grpc,infinit/grpc,geffzhang/grpc,Vizerai/grpc,kumaralokgithub/grpc,dgquintas/grpc,arkmaxim/grpc,mehrdada/grpc,malexzx/grpc,soltanmm-google/grpc,sreecha/grpc,jboeuf/grpc,carl-mastrangelo/grpc,yongni/grpc,royalharsh/grpc,donnadionne/grpc,kriswuollett/grpc,baylabs/grpc,makdharma/grpc,firebase/grpc,ncteisen/grpc,sreecha/grpc,y-zeng/grpc,deepaklukose/grpc,bogdandrutu/grpc,7anner/grpc,murgatroid99/grpc,goldenbull/grpc,simonkuang/grpc,PeterFaiman/ruby-grpc-minimal,donnadionne/grpc,jcanizales/grpc,kpayson64/grpc,daniel-j-born/grpc,ncteisen/grpc,dgquintas/grpc,LuminateWireless/grpc,zhimingxie/grpc,kumaralokgithub/grpc,yongni/grpc,dklempner/grpc,donnadionne/grpc,donnadionne/grpc,ejona86/grpc,stanley-cheung/grpc,andrewpollock/grpc,Vizerai/grpc,PeterFaiman/ruby-grpc-minimal,philcleveland/grpc,geffzhang/grpc,tengyifei/grpc,quizlet/grpc,kumaralokgithub/grpc,daniel-j-born/grpc,jboeuf/grpc,grpc/grpc,chrisdunelm/grpc,nicolasnoble/grpc,Crevil/grpc,fuchsia-mirror/third_party-grpc,goldenbull/grpc,apolcyn/grpc,ipylypiv/grpc,leifurhauks/grpc,thinkerou/grpc,MakMukhi/grpc,dgquintas/grpc,ncteisen/grpc,leifurhauks/grpc,VcamX/grpc,zhimingxie/grpc,pszemus/grpc,ctiller/grpc,a11r/grpc,simonkuang/grpc,tamihiro/grpc,ncteisen/grpc,a11r/grpc,vsco/grpc,carl-mastrangelo/grpc,kpayson64/grpc,leifurhauks/grpc,bogdandrutu/grpc,kriswuollett/grpc,y-zeng/grpc,muxi/grpc,donnadionne/grpc,ctiller/grpc,ctiller/grpc,yugui/grpc,ncteisen/grpc,muxi/grpc,podsvirov/grpc,philcleveland/grpc,donnadionne/grpc,Crevil/grpc,firebase/grpc,wcevans/grpc,hstefan/grpc,perumaalgoog/grpc,ppietrasa/grpc,pszemus/grpc,7anner/grpc,pmarks-net/grpc,chrisdunelm/grpc,grani/grpc,fuchsia-mirror/third_party-grpc,malexzx/grpc,arkmaxim/grpc,perumaalgoog/grpc,thinkerou/grpc,ejona86/grpc,donnadionne/grpc,arkmaxim/grpc,greasypizza/grpc,zhimingxie/grpc,fuchsia-mirror/third_party-grpc,stanley-cheung/grpc,jboeuf/grpc,fuchsia-mirror/third_party-grpc,quizlet/grpc,stanley-cheung/grpc,MakMukhi/grpc,jboeuf/grpc,baylabs/grpc,miselin/grpc,7anner/grpc,philcleveland/grpc,daniel-j-born/grpc,nicolasnoble/grpc,thinkerou/grpc,donnadionne/grpc,podsvirov/grpc,goldenbull/grpc,firebase/grpc,PeterFaiman/ruby-grpc-minimal,VcamX/grpc,kpayson64/grpc,nicolasnoble/grpc,goldenbull/grpc,adelez/grpc,royalharsh/grpc,firebase/grpc,adelez/grpc,hstefan/grpc,yongni/grpc,chrisdunelm/grpc,donnadionne/grpc,jboeuf/grpc,nicolasnoble/grpc,jcanizales/grpc,ipylypiv/grpc,muxi/grpc,wcevans/grpc,pmarks-net/grpc,kriswuollett/grpc,bogdandrutu/grpc,firebase/grpc,thinkerou/grpc,kriswuollett/grpc,mehrdada/grpc,mehrdada/grpc,andrewpollock/grpc,ncteisen/grpc,soltanmm/grpc,kpayson64/grpc,pmarks-net/grpc,vsco/grpc,thinkerou/grpc,soltanmm-google/grpc,pszemus/grpc,ipylypiv/grpc,Vizerai/grpc,kpayson64/grpc,bogdandrutu/grpc,VcamX/grpc,dgquintas/grpc,geffzhang/grpc,vjpai/grpc,vsco/grpc,ananthonline/grpc,deepaklukose/grpc,philcleveland/grpc,perumaalgoog/grpc,tamihiro/grpc,dklempner/grpc,yugui/grpc,jtattermusch/grpc,yang-g/grpc,firebase/grpc,pmarks-net/grpc,bogdandrutu/grpc,LuminateWireless/grpc,greasypizza/grpc,ejona86/grpc,makdharma/grpc,grani/grpc,infinit/grpc,kskalski/grpc,chrisdunelm/grpc,tengyifei/grpc,adelez/grpc,stanley-cheung/grpc,thinkerou/grpc,a-veitch/grpc,VcamX/grpc,Vizerai/grpc,LuminateWireless/grpc,deepaklukose/grpc,jcanizales/grpc,jboeuf/grpc,soltanmm/grpc,arkmaxim/grpc,PeterFaiman/ruby-grpc-minimal,jboeuf/grpc,matt-kwong/grpc,ncteisen/grpc,goldenbull/grpc,dgquintas/grpc,infinit/grpc,ananthonline/grpc,chrisdunelm/grpc,grani/grpc,y-zeng/grpc,ananthonline/grpc,ncteisen/grpc,vjpai/grpc,muxi/grpc,vjpai/grpc,LuminateWireless/grpc,zhimingxie/grpc,sreecha/grpc,leifurhauks/grpc,soltanmm-google/grpc,jtattermusch/grpc,Vizerai/grpc,hstefan/grpc,bogdandrutu/grpc,geffzhang/grpc,zhimingxie/grpc,VcamX/grpc,kskalski/grpc,ipylypiv/grpc,PeterFaiman/ruby-grpc-minimal,mehrdada/grpc,muxi/grpc,a-veitch/grpc,vjpai/grpc,royalharsh/grpc,a-veitch/grpc,sreecha/grpc,goldenbull/grpc,adelez/grpc,pszemus/grpc,philcleveland/grpc,apolcyn/grpc,malexzx/grpc,ppietrasa/grpc,kriswuollett/grpc,hstefan/grpc,ejona86/grpc,ejona86/grpc,stanley-cheung/grpc,infinit/grpc,kskalski/grpc,simonkuang/grpc,pmarks-net/grpc,murgatroid99/grpc,mehrdada/grpc,ananthonline/grpc,PeterFaiman/ruby-grpc-minimal,royalharsh/grpc,mehrdada/grpc,makdharma/grpc,kumaralokgithub/grpc,ipylypiv/grpc,msmania/grpc,sreecha/grpc,jboeuf/grpc,kumaralokgithub/grpc,vjpai/grpc,carl-mastrangelo/grpc,MakMukhi/grpc,stanley-cheung/grpc