void addDependency(Node node, Dependency dep, Predicate<PathType> filter, Path path) throws IOException {
        nodes.add(node);
        if (dep == null) {
            return;
        }
        if (dependencies.put(dep, path) != null) {
            throw new IllegalStateException("Duplicated key: " + dep);
        }
        if (path == null) {
            return;
        }
        paths.add(path);
        /*