code: public static EdgeScores tensorToEdgeScores(Tensor t) {
          if (t.getDims().length != 2) {
              throw new IllegalArgumentException("Tensor must be an nxn matrix.");
          }
          int n = t.getDims()[1];
          EdgeScores es = new EdgeScores(n, 0);        
          for (int p = -1; p < n; p++) {
              for (int c = 0; c < n; c++) {
                  if (p == c) { continue; }
                  int pp = getTensorParent(p, c);
                  es.setScore(p, c, t.get(pp, c));
              }
          }
          return es;
      }
docs: Convert a Tensor object to an EdgeScores, where the wall node is indexed as position n+1 in the Tensor.