public function executeFunction($string)
    {
        preg_match_all('/(.*)\((.*)\)/', $string, $matches);

        if (count($matches) > 0 && is_array($matches[0]) && count($matches[0]) > 0) {
            $function = $matches[1][0];

            return $function($this->removeQuotes($matches[2][0]));
        }

        return Constants::NOT_RESOLVED;
    }