return delegate().inDegree(node); // transpose
    }

    @Override
    public boolean hasEdgeConnecting(N nodeU, N nodeV) {
      return delegate().hasEdgeConnecting(nodeV, nodeU); // transpose
    }

    @Override
    public boolean hasEdgeConnecting(EndpointPair<N> endpoints) {
      return delegate().hasEdgeConnecting(transpose(endpoints));
    }
  }