Piwik\Widget\WidgetConfig::setModule PHP Method

    public function setModule($module)
    {
        $this->module = $module;
        return $this;
    }

 private function addDefaultDashboard(&$widgets)
 {
     $config = new WidgetConfig();
     $config->setIsNotWidgetizable();
     $config->setModule('Dashboard');
     $config->setAction('embeddedIndex');
     $config->setCategoryId('Dashboard_Dashboard');
     $config->setSubcategoryId('1');
     $config->setParameters(array('idDashboard' => 1));
     $widgets[] = $config;
 }