<?php  namespace App\Contracts;  use App\Services\Orders\OrderProduct;  interface DiscountValidatorHandlerInterface { 	public function setNext(DiscountValidatorHandlerInterface $next): void;  	public function handle(OrderProduct $orderProduct, mixed ...$arguments): ?DiscountValidatorHandlerInterface;  	public function next(OrderProduct $orderProduct, mixed ...$arguments): ?DiscountValidatorHandlerInterface;{}