public function getEnpsForAllClientSurveys(Collection $client_surveys): array 	{ 		$category_enps_values = [];  		$enps_calculation = 0;  		/** @var ClientSurvey $client_survey 		 */ 		foreach ($client_surveys as $client_survey) { 			$category_enps_values[] = $this->izzPdfEnpsCalculationService->calculatePercentageDataForEnpsGradeCalculation($client_survey); 			$enps_calculation += $this->izzPdfEnpsCalculationService->calculateEnpsGrade($client_survey); 		}  		$array_keys = array_keys($category_enps_values[0] ?? []); 		$count = count($category_enps_values); 		$finnalCalcualtion = []; 		$enps_average = $enps_calculation / $count;  		$finnalCalcualtion['enps_average'] = $enps_average;  		foreach ($array_keys as $array_key) { 			$finnalCalcualtion[$array_key] = round(array_sum(array_column($category_enps_values, $array_key)) / $count, 2); 		}  		return $finnalCalcualtion; 	}