}

  private GraphConnections<N, V> newConnections() {
    return isDirected()
        ? DirectedGraphConnections.<N, V>of(incidentEdgeOrder)
        : UndirectedGraphConnections.<N, V>of(incidentEdgeOrder);
  }

        (Function<N, Presence>) Functions.constant(Presence.EDGE_EXISTS);
    return graph.isDirected()
        ? DirectedGraphConnections.ofImmutable(node, graph.incidentEdges(node), edgeValueFn)
        : UndirectedGraphConnections.ofImmutable(
            Maps.asMap(graph.adjacentNodes(node), edgeValueFn));
  }

  @Override
  BaseGraph<N> delegate() {
    return backingGraph;
  }

  /**