code: public void setStaticRoute(NodesMap nm, Map<Link, Boolean> links) {
          routes.put(nm, links); // Only one route between two nodes (replace the old route)
      }
docs: Manually add a static route between two nodes.
  
  @param nm    a node mapping containing two nodes: the source and the destination node.
  @param links an insert-ordered map of link<->direction representing the path between the two nodes.