*aResult = element;
*aResult = (nsIStyledContent*) element;
NS_NewRDFElement(PRInt32 aNameSpaceId,                 nsIAtom* aTag,                 nsIContent** aResult){    NS_PRECONDITION(aResult != nsnull, "null ptr");    if (! aResult)        return NS_ERROR_NULL_POINTER;    RDFElementImpl* element =        new RDFElementImpl(aNameSpaceId, aTag);    if (! element)        return NS_ERROR_OUT_OF_MEMORY;    NS_ADDREF(element);    *aResult = element;    return NS_OK;}