static /*cached*/ L<Web> downloadedWebsFromFileNamed(S name) {
  new L<Web> webs;
  time "Unpacking webs" {
    for (S struct : downloadedDiagramStructuresForFileNamed(name)) pcall-short {
      Web web = web_flexUnstructure(struct);
      webs.add(web_setSource(name, web));
    }
  }
  ret webs;
}