| A | ↘ | B | EngineFactory got worse |
| ⇢ | A | EventManagerVariant::getEventManager() added | |
| ⇢ | A | EventManagerVariant::getEventName() added | |
| ⇢ | A | EventManagerVariant::getCallback() added | |
| ⇢ | A | EventManagerVariant::getPriority() added | |
| B | ↘ | C | EngineFactory::loadTestVariantEventManager() got worse |