| ⇢ | A | Session added | |
| A | ↘ | B | ArrayStorage got worse |
| ⇢ | C | ArrayStorage::removeByIndex() added | |
| ⇢ | B | ArrayStorage::unset() added | |
| ⇢ | B | Session::start() added | |
| ⇢ | A | Session::checkSession() added | |
| ⇢ | A | Session::set() added | |
| ⇢ | A | Session::get() added | |
| ⇢ | A | Session::unset() added | |
| ⇢ | A | Session::__construct() added | |
| ⇢ | A | AbstractController::session() added | |
| ⇢ | A | ArrayStorage::clear() added |