static Iterator ai_enumeratorFor(Web web, S plural) {
  Pair<WebNode> finder = web_findTriple(web, "A standard function that enumerates", "", plural);
  if (finder == null) fail("No finder");
  S sfName = web_operandText(finder.b, "is");
  if (sfName == null) fail("No sf");
  print("Using function: " + sfName);
  ret getIterator(makeAndCall(sfName));
}