regenerate: go install github.com/gogo/protobuf/protoc-min-version go install github.com/gogo/protobuf/protoc-gen-gogoslick protoc-min-version --version="3.0.0" --gogoslick_out=\ Mgoogle/protobuf/duration.proto=github.com/gogo/protobuf/types,\ :. \ --proto_path=../../../../../:../../protobuf/:. issue261.proto