### Release Notes for [4.1.0](https://github.com/doctrine/persistence/milestone/63) Feature release (minor) ### 4.1.0 - Total issues resolved: **0** - Total pull requests resolved: **2** - Total contributors: **2** #### Enhancement - [433: Introduce `ClassLocator` to find class names for attribute drivers](https://github.com/doctrine/persistence/pull/433) thanks to @GromNaN #### Improvement - [413: Use spl_object_id() instead of spl_object_hash()](https://github.com/doctrine/persistence/pull/413) thanks to @rosier