public function setUseAWStats(string $use_awstats = "F") : CNabuDataObject
    {
        if ($use_awstats === null) {
            throw new ENabuCoreException(
                    ENabuCoreException::ERROR_NULL_VALUE_NOT_ALLOWED_IN,
                    array("\$use_awstats")
            );
        }
        $this->setValue('nb_site_use_awstats', $use_awstats);
        
        return $this;
    }