void decodeAntiValue(Exchange exchange) throws InvalidKeyException {
        nextType(CLASS_ANTIVALUE);
        int length = _end - _next;
        if (length > 0) {
            int elisionCount = Util.getShort(_bytes, _next);
            AntiValue.fixUpKeys(exchange, elisionCount, _bytes, _next + 2, length - 2);
        }
        _next += length;
        closeVariableLengthItem();
    }