code: int[][] paths() {
          int[][] paths = new int[this.paths.size()][0];
          for (int i = 0; i < this.paths.size(); i++) {
              paths[i] = this.paths.get(i);
          }
          return paths;
      }
docs: The paths of the shortest cycles, that paths are closed walks such that
  the first and last vertex is the same.
  
  @return the paths