在Symfony2 Crawler中使用xpath获取子元素的父元素

Question

<ul id="menu">
  <li><a href='#'>First Item</a></li>
  <li><a href='#'>Second Item</a></li>
</ul>

I can access all links via xpath query.

    $result = $crawler->filterXPath('//ul[@id="menu"]/li/a');

but i wonder if is it possible to access parent element of child element using filterXPath() method without editing xpath query in PHP DomCrawler ?

For example i want to access //ul[@id="menu"] using node element in each() method.

$result = $crawler->filterXPath('//ul[@id="menu"]/li/a');
if($result->count() < 1){
  exit('Query not found.');
}
$result->each(function (Crawler $node)){
    $parentOfNode = $node->parent() // ??
    //...
};