public function toArray(Request $request): array 	{ 		return [ 			'id' => $this->getKey(), 			'quantity' => $this->quantity, 			'price' => $this->price, 			'product' => new ProductResource($this->product), 			'created_at' => formatTimestamp($this->created_at), 			'updated_at' => formatTimestamp($this->updated_at), 		]; 	}