var github.com/golang/protobuf/proto.ErrMissingExtension

3 uses

	github.com/golang/protobuf/proto (current package)
		extensions.go#L39: var ErrMissingExtension = errors.New("proto: missing extension")
		extensions.go#L168: 		return nil, ErrMissingExtension
		extensions.go#L212: 			if err == ErrMissingExtension {