* can propagate through many layers of AbstractTransformFuture up to the root call to set().
     *
     * https://github.com/google/guava/issues/2254
     *
     * Other kinds of Errors are possible:
     *
     * - OutOfMemoryError from allocations in setFuture(): The calculus here is similar to
     * StackOverflowError: We can't reliably call setException(error).

* 🌐 Add Japanese translation for Tutorial - Testing. PR [#2259](https://github.com/tiangolo/fastapi/pull/2259) by [@tokusumi](https://github.com/tokusumi).
* 🌐 Add Japanese translation for Tutorial - Debugging. PR [#2256](https://github.com/tiangolo/fastapi/pull/2256) by [@tokusumi](https://github.com/tokusumi).
* 🌐 Add Japanese translation for Tutorial - Middleware. PR [#2255](https://github.com/tiangolo/fastapi/pull/2255) by [@tokusumi](https://github.com/tokusumi).

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