private static boolean addNode(NodeList.Builder builder, Application application) {
        if (builder.containsNode(application)) {
            return false;
        }
        Node fromNode = new Node(application);
        return builder.addNode(fromNode);
    }
@author HyunGil Jeong
@author jaehong.kim
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/nodes/NodeListFactory.java