}

  /**
   * The builder class used in creation of min-max priority queues. Instead of constructing one
   * directly, use {@link MinMaxPriorityQueue#orderedBy(Comparator)}, {@link
   * MinMaxPriorityQueue#expectedSize(int)} or {@link MinMaxPriorityQueue#maximumSize(int)}.
   *
   * @param <B> the upper bound on the eventual type that can be produced by this builder (for