/**
* Returns invoice items
*
* @return \Magento\Sales\Api\Data\InvoiceItemInterface[]
*/
public function getItems()
{
if ($this->getData(InvoiceInterface::ITEMS) === null && $this->getId()) {
$collection = $this->_invoiceItemCollectionFactory->create()->setInvoiceFilter($this->getId());
foreach ($collection as $item) {
$item->setInvoice($this);
}
$this->setData(InvoiceInterface::ITEMS, $collection->getItems());
}
return $this->getData(InvoiceInterface::ITEMS);
}
/**
* Get invoice items collection
*
* @return \Magento\Sales\Model\Resource\Order\Invoice\Item\Collection
*/
public function getItemsCollection()
{
if (empty($this->_items)) {
$this->_items = $this->_invoiceItemCollectionFactory->create()->setInvoiceFilter($this->getId());
if ($this->getId()) {
foreach ($this->_items as $item) {
$item->setInvoice($this);
}
}
}
return $this->_items;
}