docs: public static Cluster updateCluster(Cluster currentCluster, List<Node> updatedNodeList) {
          List<Node> newNodeList = new ArrayList<Node>(updatedNodeList);
          for(Node currentNode: currentCluster.getNodes()) {
              if(!updatedNodeList.contains(currentNode))
                  newNodeList.add(currentNode);
          }
  
          Collections.sort(newNodeList);
          return new Cluster(currentCluster.getName(),
                             newNodeList,
                             Lists.newArrayList(currentCluster.getZones()));
      }