code: public static <T> Callback<T> convertCallback(final Reactor reactor,
                                                    final io.advantageous.reakt.CallbackHandler<T> callback) {
          return convertReaktCallbackToQBitCallback(callback, reactor.callbackBuilder());
      }
docs: Converts a Reakt callback into a QBit callback.
  <p>
  Reactor is used to manage timeouts and ensure callback happens on same thread as caller.
  
  @param reactor  QBit reactor
  @param callback reakt callback
  @param <T>      type of result
  @return QBit callback