String QUERY_BOOST_TITLE = "query.boost.title";

    /** The key of the configuration. e.g. 1.0 */
    String QUERY_BOOST_TITLE_LANG = "query.boost.title.lang";

    /** The key of the configuration. e.g. 0.05 */
    String QUERY_BOOST_CONTENT = "query.boost.content";

    /** The key of the configuration. e.g. 0.1 */
    String QUERY_BOOST_CONTENT_LANG = "query.boost.content.lang";

* `tf.keras`
    * `Model.compile` now support `steps_per_execution='auto'` as a parameter, allowing automatic tuning of steps per execution during `Model.fit`,
    `Model.predict`, and `Model.evaluate` for a significant performance boost.

## Thanks to our Contributors

This release contains contributions from many people at Google, as well as: