| ⇢ | A | CheckIfAdmin added | |
| A | ↛ | Admin removed |
| ⇢ | A | CheckIfAdmin::handle() added | |
| ⇢ | A | BaseServiceProvider::registerMiddlewareGroup() added | |
| ⇢ | A | helpers.php ➔ backpack_middleware() added | |
| A | ↛ | Admin::handle() removed | |
| A | ↛ | BaseServiceProvider::registerAdminMiddleware() removed |