docs: public void unfavorVirtualEdgePair(int virtualNodeId, int virtualEdgeId) {
          if (!isVirtualNode(virtualNodeId)) {
              throw new IllegalArgumentException("Node id " + virtualNodeId
                      + " must be a virtual node.");
          }
  
          VirtualEdgeIteratorState incomingEdge =
                  (VirtualEdgeIteratorState) getEdgeIteratorState(virtualEdgeId, virtualNodeId);
          VirtualEdgeIteratorState reverseEdge = (VirtualEdgeIteratorState) getEdgeIteratorState(
                  virtualEdgeId, incomingEdge.getBaseNode());
          incomingEdge.setUnfavored(true);
          unfavoredEdges.add(incomingEdge);
          reverseEdge.setUnfavored(true);
          unfavoredEdges.add(reverseEdge);
      }