By alexpott on
Change record status: 
Published (View all published change records)
Project: 
Drupal core
Introduced in branch: 
9.5.x
Introduced in version: 
9.5.1
Issue links: 
https://www.drupal.org/node/3327856
Description: 

Drupal 9.5 and 10.0 shipped with functionality to provide a map of object hashes to service IDs as part of \Drupal\Core\DrupalKernel. This has been replaced by the Drupal\Component\DependencyInjection\ReverseContainer service for performance reasons.

Before

$container = \Drupal::getContainer();
$mapping = \Drupal::service('kernel')->getServiceIdMapping();
$service_id = $mapping[$container->generateServiceIdHash($object)] ?? NULL;

After

$service_id = \Drupal::service('Drupal\Component\DependencyInjection\ReverseContainer')->getId($object);

Note this functionality is low level code that is used by the \Drupal\Component\DependencyInjection\DependencySerializationTrait and is not commonly required in custom or contrib code.

Impacts: 
Module developers