static L<AIConcept> findAIConcepts(S ids) {
  ret findAIConcepts(javaTokC(ids));
}

static L<AIConcept> findAIConcepts(Collection<S> ids) {
  new L<AIConcept> l;
  for (S id : ids)
    addIfNotNull(l, aiConceptsMap_cached().get(id));
  ret l;
}