static void printWeb(Web web) {
  if (web == null) { print("-"); ret; }
  L<Pair<WebNode>> relations = web_nonEmptyRelations(web);
  print("Web: " + n(web.nodes, "node") + ", " + n(relations, "relation"));
  pnlIndent(collectMethod(web_nonRelationNodes(web), 'text));
  print();
  if (nempty(relations)) {
    for (Pair<WebNode> p : relations) {
      WebNode rel = web.relations.get(p);
      S lbl = rel.text();
      if (l(rel.labels) > 1) lbl += "+";
      print(p.a.text() + " -> " + lbl + " -> " + p.b.text());
    }
    print();
  }
}