static L<WebNode> webs_search_dollarX(Web searchWeb, Collection<Web> webs) {
  new L<Map<WebNode>> mappings;
  for (Web web : webs)
    addIfNotNull(mappings, web_matchAllPerms_x(searchWeb, web, f nodeMatch_dollarVars));
  ret getFromAll(mappings, web_findNode(searchWeb, "$X"));
}