static Cache<MultiMap<S, WebNode>> cachedNodeIndex2_cache = new Cache(f dwlw_fullNodeIndex_ci);
static bool cachedNodeIndex2_first = true;
static FileStatus cachedNodeIndex2_status;

static MultiMap<S, WebNode> cachedNodeIndex2() {
  if (cachedNodeIndex2_first) {
    cachedNodeIndex2_first = false;
    onWebsChanged(f cachedNodeIndex2_clear);
    setAdd(postSoftwareMadeWeb_onNewWeb, f cachedNodeIndex2_onNewWeb);
  }
  
  FileStatus status = conceptsFileStatus(circlesEditorDBID());
  if (neq(cachedNodeIndex2_status, status)) {
    cachedNodeIndex2_status = status;
    cachedNodeIndex2_cache.clear();
  }
  ret cachedNodeIndex2_cache!;
}

static void cachedNodeIndex2_clear() {
  cachedNodeIndex2_cache.clear();
}

// called by postSoftwareMadeWeb
svoid cachedNodeIndex2_onNewWeb(Web web, O[] params) {
  lock cachedNodeIndex2_cache.lock;
  print("Incremental update");
  ai_addWebToIndex(cachedNodeIndex2_cache!, web);
  false; // don't trigger full update
}