static /*cached*/ L<Web> downloadedWebsFromFileNamed(S name) {
  new L<Web> webs;
  time "Unpacking webs" {
    for (S struct : downloadedDiagramStructuresForFileNamed(name)) pcall-short {
      if (eq(firstJavaToken(struct), "SoftwareMadeWeb"))
        struct = getString(safeUnstructure(struct), 'structure);
      webs.add(web_setSource(name, calToWeb(cal_unstructure(struct))));
    }
  }
  ret webs;
}