BasketItem::get

protected function get(BitrixSaleBasketItem $basketItem, array $fields=[])
{
	$items = $this->toArray($basketItem->getCollection()->getOrder(), $fields)['ORDER']['BASKET_ITEMS'];
	foreach ($items as $item)
	{
		if($item['ID'] == $basketItem->getId())
		{
			return $item;
		}
	}
	return [];
}