Imports github.com/golang/protobuf/proto 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 Standard library imports bytes encoding/json fmt io/ioutil log os path regexp sort strconv strings