}

  @Test
  public void incidentEdgeOrder_unordered() {
    graph = ValueGraphBuilder.directed().incidentEdgeOrder(ElementOrder.unordered()).build();
    assertThat(graph.incidentEdgeOrder()).isEqualTo(ElementOrder.unordered());
  }

  @Test
  public void incidentEdgeOrder_stable() {
    graph = ValueGraphBuilder.directed().incidentEdgeOrder(ElementOrder.stable()).build();

      @Override
      public ElementOrder<N> nodeOrder() {
        return AbstractNetwork.this.nodeOrder();
      }

      @Override
      public ElementOrder<N> incidentEdgeOrder() {
        // TODO(b/142723300): Return AbstractNetwork.this.incidentEdgeOrder() once Network has that
        //   method.
        return ElementOrder.unordered();
      }

      @Override
      public boolean isDirected() {

  }

  static <N, V> DirectedGraphConnections<N, V> of(ElementOrder<N> incidentEdgeOrder) {
    // We store predecessors and successors in the same map, so double the initial capacity.
    int initialCapacity = INNER_CAPACITY * 2;

    List<NodeConnection<N>> orderedNodeConnections;
    switch (incidentEdgeOrder.type()) {
      case UNORDERED:
        orderedNodeConnections = null;
        break;

            && nodes().contains(endpointPair.nodeU())
            && successors((N) endpointPair.nodeU()).contains(endpointPair.nodeV());
      }
    };
  }

  @Override
  public ElementOrder<N> incidentEdgeOrder() {
    return ElementOrder.unordered();
  }

  @Override
  public Set<EndpointPair<N>> incidentEdges(N node) {
    checkNotNull(node);

   * {@link #edges()}, {@link #adjacentNodes(Object)}, {@link #predecessors(Object)}, {@link
   * #successors(Object)} and {@link #incidentEdges(Object)}.
   *
   * @since 29.0
   */
  ElementOrder<N> incidentEdgeOrder();

  //
  // Element-level accessors
  //

  /**
   * Returns a live view of the nodes which have an incident edge in common with {@code node} in
   * this graph.
   *

   * #successors(Object)} and {@link #incidentEdges(Object)}.
   *
   * @since 29.0
   */
  @Override
  ElementOrder<N> incidentEdgeOrder();

  //
  // Element-level accessors
  //

  /**
   * Returns a live view of the nodes which have an incident edge in common with {@code node} in
   * this graph.
   *

   * #successors(Object)} and {@link #incidentEdges(Object)}.
   *
   * @since 29.0
   */
  @Override
  ElementOrder<N> incidentEdgeOrder();

  //
  // Element-level accessors
  //

  /**
   * Returns a live view of the nodes which have an incident edge in common with {@code node} in
   * this graph.
   *