private static Collection<Link> createNewLinkList(LinkList originalLinkList) {
        Collection<Link> linkList = originalLinkList.getLinkList();
        if (linkList.isEmpty()) {
            return List.of();
        }

        LinkList.Builder builder = LinkList.newBuilder(linkList.size());
        for (Link link : linkList) {
            if (link == null) {
                continue;
            }
            if (link.getHistogram().getTotalCount() == 0) {
                continue;
            }
            builder.addLink(link);
        }

        LinkList links = builder.build();
        return links.getLinkList();
    }
Node map

@author netspider
@author emeroad
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/DefaultApplicationMap.java