public function setMinimum(int $minimum = 10800) : CNabuDataObject
    {
        if ($minimum === null) {
            throw new ENabuCoreException(
                    ENabuCoreException::ERROR_NULL_VALUE_NOT_ALLOWED_IN,
                    array("\$minimum")
            );
        }
        $this->setValue('nb_domain_zone_minimum', $minimum);
        
        return $this;
    }