@superdweebie: This is being removed by #593. It appears this was superfluous, because you already inject filter criteria in [DocumentPersister::prepareQuery()](https://github.com/doctrine/mongodb-odm/pull/310/files#L4R784), which is called from `Expr::getQuery()`. Feel free to let me know if this conclusion is incorrect (or follow-up in the new issue). Thanks.