public function dimmers()
    {
        $widgetClasses = config('voyager.dashboard.widgets');
        $dimmers = Widget::group('voyager::dimmers');

        foreach ($widgetClasses as $widgetClass) {
            $widget = app($widgetClass);

            if ($widget->shouldBeDisplayed()) {
                $dimmers->addWidget($widgetClass);
            }
        }

        return $dimmers;
    }