| flag | Package flag implements command-line flag parsing. |
| github.com/google/gnostic/cmd/protoc-gen-openapi/generator | |
| google.golang.org/protobuf/compiler/protogen | Package protogen provides support for writing protoc plugins. |
| google.golang.org/protobuf/types/pluginpb | |
| 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. |