static new ThreadLocal<Double> web_matchAllPerms_partial_score;

static Map<WebNode> web_matchAllPerms_partial(Web patternWeb, Web inputWeb) {
  ret web_matchAllPerms_partial(patternWeb, inputWeb, 0);
}

static Map<WebNode> web_matchAllPerms_partial(Web patternWeb, Web inputWeb, double minScore) {
  L<WebNode> patternNodes = web_nodes(patternWeb);
  L<WebNode> inputNodes = web_nodes(inputWeb);
  if (l(patternNodes) > l(inputNodes))
    null;

  new Best<L<WebNode>> best;
  LL<WebNode> subsets = allSubsetsOfLength(l(patternNodes), inputNodes);
  for (L<WebNode> subset : subsets) {
    LL<WebNode> perms = allPermutations(subset);
    for (L<WebNode> perm : perms)
      best.put(perm, web_matchNodeLists(patternNodes, perm));
  }
  
  L<WebNode> l = isNaN(minScore) ? best! : best.getIfScoreAbove(minScore);
  web_matchAllPerms_partial_score.set(best.score());
  ret l == null ? null : twoListsToOrderedMap(patternNodes, l);
}