Neos\ContentRepository\Domain\Service\ImportExport\NodeImportService::persistEntities PHP Method

    protected function persistEntities($propertyValue)
    {
        if (!$propertyValue instanceof \Iterator && !is_array($propertyValue)) {
            $propertyValue = array($propertyValue);
        }
        foreach ($propertyValue as $possibleEntity) {
            if (is_object($possibleEntity) && $possibleEntity instanceof PersistenceMagicInterface) {
                $this->persistenceManager->isNewObject($possibleEntity) ? $this->persistenceManager->add($possibleEntity) : $this->persistenceManager->update($possibleEntity);
                // TODO: Needed because the originalAsset will not cascade persist. We should find a generic solution to this.
                if ($possibleEntity instanceof ImageVariant) {
                    $asset = $possibleEntity->getOriginalAsset();
                    $this->persistenceManager->isNewObject($asset) ? $this->persistenceManager->add($asset) : $this->persistenceManager->update($asset);
                }
            }
        }
    }