code: @Deprecated //errors aren't propagated across Adapters (at least without continuations)
      public <X extends Throwable> Option<Try<V, X>> oneValueOrError(final K key, final Class<X>... classes) {
          final ValueSubscriber<V> sub = ValueSubscriber.subscriber();
          return get(key).peek(a -> a.stream()
                                     .subscribe(sub))
                         .map(a -> sub.toTry(classes));
      }
docs: Extact one value from the selected pipe or an zero Maybe if it doesn't exist. Currently only Adapter's and not Publishers
  are managed by Pipes so Publisher errors are not propagated (@see {@link Pipes#oneValue(Object)} or @see {@link Pipes#oneOrError(Object)} is better at the moment.
  
  <pre>
  {@code
  Queue<String> q = new Queue<>();
  pipes.register("hello", q);
  pipes.push("hello", "world");
  pipes.push("hello", "world2");
  
  
  pipes.oneValueOrError("hello",Throwable.class).getValue(); //Try["world"]
  
  }
  </pre>
  
  @param key
  @param classes
  @return