public function exportComparableReportExcel(string $filename): BinaryFileResponse 	{ 		$demographic_questions = $this->getDemographicQuestionTitles();  		if ($this->total_applicants == 0) { 			abort(422, (string) __('client-surveys.validation.not-enough-applicants')); 		}  		return Excel::download(new ComparableReportExcel($this->basic_reports, $this->filter_values, $demographic_questions, $this->locale), $filename . '.xlsx'); 	}