public function getEsiForClientSurveysInSameTopLevelIndustry(Collection $client_surveys): EsiDataObject 	{ 		$applicants = new Collection;  		$client_surveys->each(function (ClientSurvey $item) use ($applicants) { 			foreach ($item->getApplicants() as $applicant) { 				$applicants->push($applicant); 			} 		});  		return $this->esiService->generate($applicants); 	}