BasketItemCollection::getItemById

public function getItemById($id)
{
	$id = (int)$id;

	if ($id <= 0)
	{
		return null;
	}

	/** @var BasketItemBase $basketItem */
	foreach ($this->collection as $basketItem)
	{
		$item = $basketItem->findItemById($id);
		if ($item !== null)
		{
			return $item;
		}
	}

	return null;
}