}
  }

  public void testTransformAsync_asyncFunction_error() throws InterruptedException {
    final Error error = new Error("deliberate");
    AsyncFunction<String, Integer> function =
        new AsyncFunction<String, Integer>() {
          @Override
          public ListenableFuture<Integer> apply(String input) {
            throw error;
          }
        };

    }
  }

  public void testTransformAsync_asyncFunction_error() throws InterruptedException {
    final Error error = new Error("deliberate");
    AsyncFunction<String, Integer> function =
        new AsyncFunction<String, Integer>() {
          @Override
          public ListenableFuture<Integer> apply(String input) {
            throw error;
          }
        };

   *     underlying this step or, if {@code get()} throws a different kind of exception, that
   *     exception itself. To avoid hiding bugs and other unrecoverable errors, callers should
   *     prefer more specific types, avoiding {@code Throwable.class} in particular.
   * @param fallback the function to be called if this step fails with the expected exception type.