Piwik\Plugins\Events\Reports\Base::configureFooterMessage PHP Method

    protected function configureFooterMessage(ViewDataTable $view)
    {
        if ($this->isSubtableReport) {
            // no footer message for subtables
            return;
        }
        $out = '';
        EventDispatcher::getInstance()->postEvent('Template.afterEventsReport', array(&$out));
        $view->config->show_footer_message = $out;
    }