/**
* @param string|array $expression
* @param null|\DOMNode|\DOMDocument|Document|Html|Table|Form|Attr|Element|Tag|Field|Text|Cdata|Comment $contextnode
* @param bool $registerNodeNS
*
* @return Set
*/
public function query($expression, \DOMNode $contextnode = null, $registerNodeNS = true)
{
$prepared = $this->expression($expression);
$result = @parent::query($prepared, $contextnode, $registerNodeNS);
$this->doc->debug(array('result', $expression, $prepared, $result));
return $this->doc->set($result);
}
