static class ExecutorSpy implements Executor {

    Executor delegate;
    boolean wasExecuted;

    public ExecutorSpy(Executor delegate) {
      this.delegate = delegate;
    }

    @Override
    public void execute(Runnable command) {
      delegate.execute(command);
      wasExecuted = true;
    }
  }

  public void testTransform_Executor() throws Exception {

  static class ExecutorSpy implements Executor {

    Executor delegate;
    boolean wasExecuted;

    public ExecutorSpy(Executor delegate) {
      this.delegate = delegate;
    }

    @Override
    public void execute(Runnable command) {
      delegate.execute(command);
      wasExecuted = true;
    }
  }

  public void testTransform_Executor() throws Exception {

   *     exception itself.
   * @param executor the executor that runs {@code fallback} if the input fails
   */
  public <X extends Throwable> ClosingFuture<V> catching(
      Class<X> exceptionType, ClosingFunction<? super X, ? extends V> fallback, Executor executor) {
    return catchingMoreGeneric(exceptionType, fallback, executor);
  }

    /** The key of the message: Result */
    public static final String LABELS_SCRIPT_RESULT = "{labels.scriptResult}";

    /** The key of the message: Executor */
    public static final String LABELS_SCRIPT_TYPE = "{labels.scriptType}";

    /** The key of the message: Segmentation */
    public static final String LABELS_SEGMENTATION = "{labels.segmentation}";