public function toArray($request): array 	{ 		return [ 			'ppi_survey_id' => $this->getKey(), 			'survey_id' => $this->survey_id, 			'ppi_questions' => PpiQuestionResource::collection($this->survey->questions->where('class', QuestionClass::PpiBasic)->load(['professions'])), 			'demographic_questions' => PpiQuestionResource::collection($this->demographicQuestions), 			'prize_questions' => PpiQuestionResource::collection($this->survey->questions->where('class', QuestionClass::PpiPrize)->load(['professions'])), 			'created_at' => formatTimestamp($this->created_at), 			'updated_at' => formatTimestamp($this->updated_at), 		]; 	}