docs: public PrepareContractionHierarchies useFixedNodeOrdering(NodeOrderingProvider nodeOrderingProvider) {
          if (nodeOrderingProvider.getNumNodes() != prepareGraph.getNodes()) {
              throw new IllegalArgumentException(
                      "contraction order size (" + nodeOrderingProvider.getNumNodes() + ")" +
                              " must be equal to number of nodes in graph (" + prepareGraph.getNodes() + ").");
          }
          this.nodeOrderingProvider = nodeOrderingProvider;
          return this;
      }