kubernetes/vendor/google.golang.org/protobuf/reflect/protodesc/desc_validate.go

func validateEnumDeclarations(es []filedesc.Enum, eds []*descriptorpb.EnumDescriptorProto) error { … }

func validateMessageDeclarations(file *filedesc.File, ms []filedesc.Message, mds []*descriptorpb.DescriptorProto) error { … }

func validateExtensionDeclarations(f *filedesc.File, xs []filedesc.Extension, xds []*descriptorpb.FieldDescriptorProto) error { … }

// isOptionalMessage reports whether this is an optional message.
// If the kind is unknown, it is assumed to be a message.
func isOptionalMessage(fd protoreflect.FieldDescriptor) bool { … }

// isPackable checks whether the pack option can be specified.
func isPackable(fd protoreflect.FieldDescriptor) bool { … }

// checkValidGroup reports whether fd is a valid group according to the same
// rules that protoc imposes.
func checkValidGroup(f *filedesc.File, fd protoreflect.FieldDescriptor) error { … }

// checkValidMap checks whether the field is a valid map according to the same
// rules that protoc imposes.
// See protoc v3.8.0: src/google/protobuf/descriptor.cc:6045-6115
func checkValidMap(fd protoreflect.FieldDescriptor) error { … }