static Set<S> gazelle_allKeysAndValuesFromGoodMappings() {
  Set<S> set = ciSet();
  for (O c : cloneList((L) dm_call(dm_gazelle_feedbackCRUD, 'allGoodFeedback)) pcall {
    set.addAll(keysAndValues(safeUnstructMap(getString varMap(c))));
  }
  ret set;
}