*   `CategoryCrossing`: create new categorical features representing
        co-occurrences of previous categorical feature values
    *   `Hashing`: the hashing trick, for large-vocabulary categorical features
    *   `Discretization`: turn continuous numerical features into categorical
        features by binning their values
*   Improved **image preprocessing** layers: `CenterCrop`, `Rescaling`

## 0.135.0 (2026-03-01)

### Features

* ✨ Add support for Server Sent Events. PR [#15030](https://github.com/fastapi/fastapi/pull/15030) by [@tiangolo](https://github.com/tiangolo).
    * New docs: [Server-Sent Events (SSE)](https://fastapi.tiangolo.com/tutorial/server-sent-events/).

## 0.134.0 (2026-02-27)

### Features

- Generic ephemeral volumes, a new alpha feature under the `GenericEphemeralVolume` feature gate, provide a more flexible alternative to `EmptyDir` volumes: as with `EmptyDir`, volumes are created and deleted for each pod automatically by Kubernetes. But because the normal provisioning process is used (`PersistentVolumeClaim`), storage can be provided by third-party storage vendors and all of the usual volume features work. Volumes don't need to be empt; for example, restoring...

     * comment: Whether RAG chat feature is enabled.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getRagChatEnabled();

    /**
     * Is the property for the key 'rag.chat.enabled' true? <br>
     * The value is, e.g. false <br>
     * comment: Whether RAG chat feature is enabled.