public function __construct(int $quantity, DiscountableItem $discountableItem, Totals $totals, string $price) 	{ 		$this->quantity = $quantity; 		$this->discountableItem = $discountableItem; 		$this->totals = $totals; 		$this->price = $price; 		$this->currentlyCalculatedPrice = $price; 	}