public function setSearchVisibility(string $search_visibility = "N") : CNabuDataObject
    {
        if ($search_visibility === null) {
            throw new ENabuCoreException(
                    ENabuCoreException::ERROR_NULL_VALUE_NOT_ALLOWED_IN,
                    array("\$search_visibility")
            );
        }
        $this->setValue('nb_user_search_visibility', $search_visibility);
        
        return $this;
    }