in tools/ci/paimon-ci-tools/src/main/java/org/apache/paimon/tools/ci/utils/shared/DependencyTree.java [42:51]
    public void addDirectDependency(Dependency dependency) {
        final String key = getKey(dependency);
        if (lookup.containsKey(key)) {
            return;
        }
        final Node node = new Node(dependency, null);
        lookup.put(key, node);
        directDependencies.add(node);
    }