protected function getRenderedReport($templateFilename = '', $variables = [])
    {
        $templatePath = 'EXT:solr/Resources/Private/Templates/Backend/Reports/' . $templateFilename;
        $standaloneView = $this->getFluidStandaloneViewWithTemplate($templatePath);
        $standaloneView->assignMultiple($variables);

        return $standaloneView->render();
    }