| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/golang/glog | Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup. |
| github.com/golang/protobuf/proto | Package proto provides functionality for handling protocol buffer messages. |
| github.com/golang/protobuf/protoc-gen-go/descriptor | |
| github.com/golang/protobuf/protoc-gen-go/generator | Package generator is deprecated. |
| github.com/golang/protobuf/protoc-gen-go/plugin | |
| github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway/httprule | |
| github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis/google/api | |
| path | Package path implements utility routines for manipulating slash-separated paths. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |