static L<Pair<S>> downloadedDiagramStructures2() {
  ret downloadedDiagramStructures2(listFilesOfProgram_notDirs(#1010484));
}

static L<Pair<S>> downloadedDiagramStructures2(L<File> files) {
  new L<Pair<S>> diagrams;
  for (File f : files) {
    if (!isPossibleMD5(f.getName()) || !f.isFile()) continue;
    print(f);
    if (fileStartsWith(f, toUtf8("CirclesAndLines"))) {
      print("Diagram!");
      diagrams.add(pair(loadTextFile(f), ""));
    } else if (isGZ(f)) {
      //print("GZipped!");
      Concepts c = new Concepts().loadGrab(loadGZippedTextFile(f), true);
      int n = 0;
      for (Concept d : concepts.allConcepts()) {
        S s = getString(d, 'calStructure);
        S id = getString(d, 'globalID);
        if (s != null) {
          diagrams.add(pair(s, id));
          ++n;
        }
      }
      print("Got " + n(n, "diagram"));
    } else
      print("Huh?");
  }
  ret diagrams;
}

Began life as a copy of #1010500