kubernetes/vendor/google.golang.org/protobuf/internal/encoding/tag/tag.go

var byteType …

// Unmarshal decodes the tag into a prototype.Field.
//
// The goType is needed to determine the original protoreflect.Kind since the
// tag does not record sufficient information to determine that.
// The type is the underlying field type (e.g., a repeated field may be
// represented by []T, but the Go type passed in is just T).
// A list of enum value descriptors must be provided for enum fields.
// This does not populate the Enum or Message (except for weak message).
//
// This function is a best effort attempt; parsing errors are ignored.
func Unmarshal(tag string, goType reflect.Type, evs protoreflect.EnumValueDescriptors) protoreflect.FieldDescriptor { … }

// Marshal encodes the protoreflect.FieldDescriptor as a tag.
//
// The enumName must be provided if the kind is an enum.
// Historically, the formulation of the enum "name" was the proto package
// dot-concatenated with the generated Go identifier for the enum type.
// Depending on the context on how Marshal is called, there are different ways
// through which that information is determined. As such it is the caller's
// responsibility to provide a function to obtain that information.
func Marshal(fd protoreflect.FieldDescriptor, enumName string) string { … }