public function setGlobalExcludedQueryParameters($excludedQueryParameters)
    {
        Piwik::checkUserHasSuperUserAccess();
        $excludedQueryParameters = $this->checkAndReturnCommaSeparatedStringList($excludedQueryParameters);
        Option::set(self::OPTION_EXCLUDED_QUERY_PARAMETERS_GLOBAL, $excludedQueryParameters);
        Cache::deleteTrackerCache();
        return true;
    }