protected function unmarshall(DOMElement $element)
    {
        $node = $element->cloneNode(true);
        
        return new Sub($element->ownerDocument->saveXML($node));
    }
protected function unmarshall(DOMElement $element)
    {
        $node = $element->cloneNode(true);
        
        return new Sub($element->ownerDocument->saveXML($node));
    }
protected function unmarshall ( DOMElement $ element ) { $ node = $ element -> cloneNode ( true ) ; return new Sub ( $ element -> ownerDocument -> saveXML ( $ node ) ) ; }
Unmarshall a DOMElement object corresponding to an SSML sub element.

@param \DOMElement $element A DOMElement object.
@return \qtism\data\QtiComponent An SSML sub object.
@throws \UnmarshallingException
Unmarshall a DOMElement object corresponding to an SSML sub element .