static void ai_addWebToIndex(MultiMap<S, WebNode> index, Web web) {
  if (web != null)
    for (WebNode node : web_nodesAndRelations(web))
      for (S text : asSet(node.texts())) {
        S key = ai_shortenForIndex(text);
        bool newText = !contains(web_fullTextSet(index.get(key)), text);
        index.put(key, node);
        if (newText)
          ai_onNewIndexedText(text);
      }
}