public function getAllowedQuestionIds(ClientSurvey $client_survey): array 	{ 		$main_questions = $client_survey->survey?->questions()->pluck('questions.id')->all() ?? []; 						// basic questions 		$extra_questions = $client_survey->extraQuestions() 		->pluck('questions.id') 		->all(); 			// brand awareness questions 		$general_brand_questions = $client_survey->ppiBrandAwarenessQuestions()->pluck('questions.id')->all();	// brand awareness questions  		return array_merge($extra_questions, $general_brand_questions, $main_questions); 	}