}

  private NetworkConnections<N, E> newConnections() {
    return isDirected()
        ? allowsParallelEdges()
            ? DirectedMultiNetworkConnections.<N, E>of()
            : DirectedNetworkConnections.<N, E>of()
        : allowsParallelEdges()
            ? UndirectedMultiNetworkConnections.<N, E>of()
            : UndirectedNetworkConnections.<N, E>of();
  }

      int selfLoopCount = network.edgesConnecting(node, node).size();
      return network.allowsParallelEdges()
          ? DirectedMultiNetworkConnections.ofImmutable(inEdgeMap, outEdgeMap, selfLoopCount)
          : DirectedNetworkConnections.ofImmutable(inEdgeMap, outEdgeMap, selfLoopCount);
    } else {
      Map<E, N> incidentEdgeMap =
          Maps.asMap(network.incidentEdges(node), adjacentNodeFn(network, node));