BundleCollection::getBasket

public function getBasket()
{
	$collection = $this;

	while($collection && $collection instanceof BundleCollection)
	{
		$entityParent = $collection->getEntityParent();
		$collection = $entityParent->getCollection();
	}

	if ($collection instanceof BasketBase)
	{
		return $collection;
	}

	return null;
}