Entity Export using Serialization

export.php

<?php

use Drupal\node\Entity\Node;

use Drupal\serialization\Normalizer\ContentEntityNormalizer;
use Drupal\serialization\Encoder\XmlEncoder;

use Symfony\Component\Serializer\Serializer;
use Symfony\Component\Serializer\Encoder\JsonEncode;

$node = Node::load(4);

$data = $node->toArray();

if ($node->getEntityType()->hasKey('id')) {
  unset($data[$node->getEntityType()->getKey('id')]);
}

if ($node->getEntityType()->hasKey('revision')) {
  unset($data[$node->getEntityType()->getKey('revision')]);
}

$encoders = array(new XmlEncoder());
$normalizers = array(new ContentEntityNormalizer(\Drupal::service('entity.manager')));

$serializer = new Serializer($normalizers, $encoders);

$xml = $serializer->serialize($data, 'xml');

file_put_contents('node.xml', $xml);

Import.php

<?php

use Drupal\serialization\Normalizer\ContentEntityNormalizer;
use Drupal\serialization\Encoder\XmlEncoder;

use Symfony\Component\Serializer\Serializer;
use Symfony\Component\Serializer\Encoder\JsonEncode;

$data = file_get_contents('node.xml');

$encoders = array(new XmlEncoder());
$normalizers = array(new ContentEntityNormalizer(\Drupal::service('entity.manager')));

$serializer = new Serializer($normalizers, $encoders);

$node = $serializer->deserialize($data, 'Drupal\node\Entity\Node', 'xml', array(
  'entity_type' => 'node',
));

$node->save();

Don't think these works anymore.