public function checkIsAliasExistsAlready($alias, $path, array $pathParameters = array(), $locale = null)
    {
        if ($alias === null) {
            return false;
        }
        $already = $this->findByAlias($alias);
        if ($already) {
            $seo = $this->createNewAlias($alias, $path, $pathParameters, $locale);
            if ($seo->getKeyword() == $already->getKeyword()) {
                return false;
            }

            return true;
        }

        return false;
    }