// marshaller understands.
String errorCode = parseErrorCode(node);
if (errorCode == null || !errorCode.equals("InvalidNumberPredicates"))
return null;
InvalidNumberPredicatesException e = (InvalidNumberPredicatesException)super.unmarshall(node);
e.setBoxUsage(XpathUtils.asFloat(getErrorPropertyPath("BoxUsage"), node));
return e;
}