private function getReferrerSparklineParams($referrerType)
    {
        $totalRow = $this->translator->translate('General_Total');

        return array(
            'columns'      => array('nb_visits'),
            'rows'         => array(self::getTranslatedReferrerTypeLabel($referrerType), $totalRow),
            'typeReferrer' => $referrerType,
            'module'       => $this->pluginName,
            'action'       => 'getReferrerType'
        );
    }