}
  }

  private final Heap minHeap;
  private final Heap maxHeap;
  @VisibleForTesting final int maximumSize;
  private @Nullable Object[] queue;
  private int size;
  private int modCount;

  private MinMaxPriorityQueue(Builder<? super E> builder, int queueSize) {
    Ordering<E> ordering = builder.ordering();
    this.minHeap = new Heap(ordering);
    this.maxHeap = new Heap(ordering.reverse());

    }
  }

  private final Heap minHeap;
  private final Heap maxHeap;
  @VisibleForTesting final int maximumSize;
  private @Nullable Object[] queue;
  private int size;
  private int modCount;

  private MinMaxPriorityQueue(Builder<? super E> builder, int queueSize) {
    Ordering<E> ordering = builder.ordering();
    this.minHeap = new Heap(ordering);
    this.maxHeap = new Heap(ordering.reverse());

    final List<E> elements;
    int modCount = 0;

    PickyIterable(E... elements) {
      this.elements = new ArrayList<E>(asList(elements));
    }

    @Override
    public Iterator<E> iterator() {
      return new PickyIterator();
    }

    final class PickyIterator implements Iterator<E> {
      int expectedModCount = modCount;
      int index = 0;
      boolean canRemove;

    final List<E> elements;
    int modCount = 0;

    PickyIterable(E... elements) {
      this.elements = new ArrayList<E>(asList(elements));
    }

    @Override
    public Iterator<E> iterator() {
      return new PickyIterator();
    }

    final class PickyIterator implements Iterator<E> {
      int expectedModCount = modCount;
      int index = 0;
      boolean canRemove;