// only works within a module
sclass StandardFunctions is AutoCloseable {
  volatile SS map;
  AutoCloseable updater;

  *() {  
    updater = dm_onSnippetEdited(voidfunc(S id) {
      if (sameSnippetID(id, #1006654) || sameSnippetID(id, #761))
        map = null;
    });
  }
  
  // name to snippetID
  SS getMap() {
    if (map == null) map = stdFunctions_uncached();
    ret map;
  }
  
  public void close {
    dispose updater;
  }
}