public function createMatrix(ClientSurvey $client_survey, GetComparativeReportByYear $request, string $locale): array 	{ 		$filter_question = $request->comparative_survey_by_year_filters[$client_survey->getKey()]['comparative_filter_values'] ?? []; 		$filter_locations = $request->comparative_survey_by_year_filters[$client_survey->getKey()]['comparative_locations'] ?? []; 		$filter_departments = $request->comparative_survey_by_year_filters[$client_survey->getKey()]['comparative_departments'] ?? [];  		$this->canGenerateComparativeReportByYear($client_survey, $request, $locale, $filter_question, $filter_locations, $filter_departments);  		return [array_keys($filter_question), $filter_locations, $filter_departments]; 	}