docs: public static int nvgraphSpectralClustering(
          nvgraphHandle handle, 
          nvgraphGraphDescr graph_descr, 
          long weight_index, 
          SpectralClusteringParameter params, 
          Pointer clustering, 
          Pointer eig_vals, 
          Pointer eig_vects)
      {
          return checkResult(nvgraphSpectralClusteringNative(handle, graph_descr, weight_index, params, clustering, eig_vals, eig_vects));
      }