public function getLastDistinctWebsitesGraph()
{
$view = $this->getLastUnitGraph($this->pluginName, __FUNCTION__, "Referrers.getNumberOfDistinctWebsites");
$view->config->translations['Referrers_distinctWebsites'] = ucfirst($this->translator->translate('Referrers_DistinctWebsites'));
$view->config->columns_to_display = array('Referrers_distinctWebsites');
return $this->renderView($view);
}