Refactor proto comment extractor
Refactor proto comment extractor

gengo/grpc-gateway,tmc/grpc-gateway,improbable-io/grpc-gateway,ilius/grpc-gateway,tmc/grpc-gateway,ilius/grpc-gateway,grpc-ecosystem/grpc-gateway,Lantame/grpc-gateway,ilius/grpc-gateway,improbable-io/grpc-gateway,Lantame/grpc-gateway,gengo/grpc-gateway