/**
* Resets the menu link to its default settings.
*
* @param \Drupal\Core\Menu\MenuLinkInterface $instance
* The menu link which should be reset.
*
* @return \Drupal\Core\Menu\MenuLinkInterface
* The reset menu link.
*
* @throws \Drupal\Component\Plugin\Exception\PluginException
* Thrown when the menu link is not resettable.
*/
protected function resetInstance(MenuLinkInterface $instance)
{
$id = $instance->getPluginId();
if (!$instance->isResettable()) {
throw new PluginException("Menu link {$id} is not resettable");
}
// Get the original data from disk, reset the override and re-save the menu
// tree for this link.
$definition = $this->getDefinitions()[$id];
$this->overrides->deleteOverride($id);
$this->treeStorage->save($definition);
return $this->createInstance($id);
}
