static /*cached*/ L<Web> downloadedTypicalWebs() {
  new L<Web> webs;
  time "Unpacking webs" {
    for (S struct : downloadedTypicalDiagramStructures()) pcall-short {
      webs.add(web_setSource("downloaded typical", calToWeb(cal_unstructure(struct))));
    }
  }
  ret webs;
}