Imports
- github.com/golang/glog
- github.com/golang/protobuf/proto
- github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway/httprule
- github.com/golang/protobuf/protoc-gen-go/generator
- google.golang.org/genproto/googleapis/api/annotations
- github.com/golang/protobuf/protoc-gen-go/plugin
- github.com/golang/protobuf/protoc-gen-go/descriptor