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