public function checkIfSurveyQuestionCountMatchesReceivedAnswers(Applicant $applicant, array $request): bool 	{ 		$main_question_IDs = $applicant->survey->mainQuestions->where('required', true)->pluck('id')->all(); 		$extra_question_IDs = $applicant->survey->extraQuestions->where('required', true)->pluck('id')->all();  		$merged_IDs = array_merge($main_question_IDs, $extra_question_IDs);  		return empty(array_diff($merged_IDs, array_keys($request['answer_values']))); 	}