ShipmentCollection::isShipped

public function isShipped()
{
	if (!empty($this->collection) && is_array($this->collection))
	{
		/** @var Shipment $shipment */
		foreach ($this->collection as $shipment)
		{
			if ($shipment->isSystem())
			{
				if (!$shipment->isEmpty())
				{
					return false;
				}

				continue;
			}

			if (!$shipment->isShipped() && !$shipment->isEmpty())
			{
				return false;
			}
		}

		return true;
	}

	return false;
}