/**
  * @param \DOMElement            $dom
  * @param DeserializationContext $deserializationContext
  *
  * @return Assertion
  */
 protected function getAssertionFromDom(\DOMElement $dom, DeserializationContext $deserializationContext)
 {
     $deserializationContext->setDocument($dom->ownerDocument);
     $assertion = new Assertion();
     $assertion->deserialize($dom, $deserializationContext);
     return $assertion;
 }