protected function processCopyrights($errorPos)
    {
        $copyrights = $this->commentParser->getCopyrights();
        $copyright  = $copyrights[0];
        if ($copyright !== null) {
            $content = $copyright->getContent();
            if (empty($content) === true) {
                $error = 'Content missing for @copyright tag in file comment';
                $this->currentFile->addError($error, $errorPos, 'MissingCopyright');
            } else if (preg_match('/^([0-9]{4})(-[0-9]{4})? (\.*\)$/', $content) === 0) {
                $error = 'Expected "xxxx-xxxx Barracuda Networks, Inc." for copyright declaration';
                $this->currentFile->addError($error, $errorPos, 'IncorrectCopyright');
            }
        }
    }