static S dumpConcepts2(L<AIConcept> concepts) {
  new L<S> l;
  for (AIConcept c : concepts) {
    L x = ll(c.globalID, c.name);
    addIfNempty(x, c.comment);
    l.add("  " + struct(x));
  }
  ret print("[\n" + join(",\n", l) + "\n]");
}