| ⇢ | A | PostCollectionLoadEventArgs added |
| ⇢ | A | PostCollectionLoadEventArgs::__construct() added | |
| ⇢ | A | LifecycleEventManager::postCollectionLoad() added | |
| ⇢ | A | PostCollectionLoadEventArgs::getCollection() added | |
| A | ↘ | B | PersistentCollectionTrait::count() got worse |