private function loadXmlAttributeStatement(\DOMElement $root, \DOMXPath $xpath)
{
/** @var $list \DOMElement[] */
$list = $xpath->query('./saml:AttributeStatement/saml:Attribute', $root);
foreach ($list as $a) {
$attr = new Attribute();
$attr->loadFromXml($a);
$this->addAttribute($attr);
}
}
