protected function combinator()
    {
        $ret = false;
        $combinatorNames = array_keys($this->_combinators);

        if (list($name) = $this->in($combinatorNames)) {
            $combinator = $this->_combinators[$name];
            $ret = CssParserCombinatorFactory::getInstance(
                $combinator["classname"], $combinator["user_def_function"]
            );
        }

        return $ret;
    }