/**
* Perform an xpath query and return only the 1st match
*
* @param String $q query string containing xpath
* @param \DOMNode $ctx (optional) Context DOMNode
* @param boolean $registerNodeNS Register flag pass thru
*
* @return fDOMNode
*/
public function queryOne($q, \DOMNode $ctx = NULL, $registerNodeNS = TRUE)
{
if (is_null($this->xp)) {
$this->getDOMXPath();
}
return $this->xp->queryOne($q, $ctx, $registerNodeNS);
}
