public function getFoundUnexpectedArchiveArtifacts()
    {
        if ($this->ranValidate === false) {
            $message = 'Git archive ' . $this->archive->getFilename()
                . ' not validated. Run validate first.';
            throw new GitArchiveNotValidatedYet($message);
        }

        return $this->archive->getFoundUnexpectedArtifacts();
    }