<?php  namespace App\Enums;  enum QuestionClass: int { 	case Basic = 1;  	case Additional = 2;  	case Demographic = 3;  	case PpiBasic = 4;  	case PpiBrandAwareness = 5;  	case PpiPrize = 6;  	case PpiDemographic = 7;  	case NegativeBasic = 8;  	public static function izzQuestionClasses(): array 	{ 		return [ 			self::Basic, 			self::Additional, 			self::Demographic,  		]; 	}  	public static function ppiQuestionClasses(): array 	{ 		return [ 			self::PpiBasic, 			self::PpiBrandAwareness, 			self::PpiPrize, 			self::PpiDemographic,  		]; 	}  	public static function selectablePpiQuestionClasses(): array 	{ 		return [ 			self::PpiBasic, 			self::PpiPrize, 			self::PpiDemographic,  		]; 	}  	public static function selectableBaQuestionClasses(): array 	{ 		return [ 			self::PpiBasic, 			self::PpiBrandAwareness,  		]; 	}  	public static function categoryIdProhibitedCases(): string 	{ 		return self::Additional->value . ',' 			. self::Demographic->value . ',' 			. self::PpiDemographic->value . ',' 			. self::PpiBrandAwareness->value; 	}  	public static function clientSurveyIdProhibitedCases(): string 	{ 		return self::Basic->value . ',' 			. self::Demographic->value . ',' 			. self::PpiDemographic->value . ',' 			. self::PpiBasic->value . ',' 			. self::PpiPrize->value; 	} }