Method onFailure

future-java/src/main/java/io/trane/future/NoFuture.java:67–70

(final Consumer<Throwable> c)

  }

  @Override
  public Future<T> onFailure(final Consumer<Throwable> c) {
    return this;
  }

  @Override
  public Future<T> respond(final Responder<? super T> r) {