return delegate().edgeValueOrDefault(transpose(endpoints), defaultValue);
    }
  }

  private static class TransposedNetwork<N, E> extends ForwardingNetwork<N, E> {
    private final Network<N, E> network;

    TransposedNetwork(Network<N, E> network) {
      this.network = network;
    }

    @Override
    Network<N, E> delegate() {