func DefaultVersion(c context.Context, module string) (string, error) {
	req := &pb.GetDefaultVersionRequest{}
	if module != "" {
		req.Module = &module
	}
	res := &pb.GetDefaultVersionResponse{}
	err := internal.Call(c, "modules", "GetDefaultVersion", req, res)
	return res.GetVersion(), err
}
func DefaultVersion(c context.Context, module string) (string, error) {
	req := &pb.GetDefaultVersionRequest{}
	if module != "" {
		req.Module = &module
	}
	res := &pb.GetDefaultVersionResponse{}
	err := internal.Call(c, "modules", "GetDefaultVersion", req, res)
	return res.GetVersion(), err
}
// DefaultVersion returns the default version of the specified module.
// If module is the empty string, it means the default module.