_menu_ui_node_save

_menu_ui_node_save(NodeInterface $node, array $values)

function _menu_ui_node_save(NodeInterface $node, array $values) {
  /** @var \Drupal\menu_link_content\MenuLinkContentInterface $entity */
  if (!empty($values['entity_id'])) {
    $entity = MenuLinkContent::load($values['entity_id']);
    if ($entity->isTranslatable()) {
      if (!$entity->hasTranslation($node->language()->getId())) {
        $entity = $entity->addTranslation($node->language()->getId(), $entity->toArray());
      }
      else {
        $entity = $entity->getTranslation($node->language()->getId());
      }
    }
  }
  else {
    // Create a new menu_link_content entity.
    $entity = MenuLinkContent::create(array(
      'link' => ['uri' => 'entity:node/' . $node->id()],
      'langcode' => $node->language()->getId(),
    ));
    $entity->enabled->value = 1;
  }
  $entity->title->value = trim($values['title']);
  $entity->description->value = trim($values['description']);
  $entity->menu_name->value = $values['menu_name'];
  $entity->parent->value = $values['parent'];
  $entity->weight->value = isset($values['weight']) ? $values['weight'] : 0;
  $entity->save();
}