| ⇢ | A | UnionHandler added |
| ⇢ | B | UnionHandler::testPrimitive() added | |
| ⇢ | A | UnionHandler::matchSimpleType() added | |
| ⇢ | A | UnionHandler::getSubscribingMethods() added | |
| ⇢ | A | UnionHandler::serializeUnion() added | |
| ⇢ | A | UnionHandler::determineType() added | |
| ⇢ | A | UnionHandler::deserializeUnion() added | |
| ⇢ | A | UnionHandler::reorderTypes() added | |
| ⇢ | A | TypedPropertiesDriver::shouldTypeHintUnion() added | |
| A | ↘ | B | TypedPropertiesDriver::loadMetadataForClass() got worse |