static <A> A reverseLookupCI(S value, Map<A, S> map) {
  ret reverseLookupCI(map, value);
}

static <A> A reverseLookupCI(Map<A, S> map, S value) {
  if (map != null && value != null) for (A key : map.keySet())
    if (eqic(map.get(key), value))
      ret key;
  ret null;
}