static <A extends Concept> Cl<A> nuLike conceptsSortedByFieldAlphanumIC(Class<A> c, S field) {
  ret conceptsSortedByFieldAlphanumIC(db_mainConcepts(), c, field);
}

static <A extends Concept> Cl<A> conceptsSortedByFieldAlphanumIC(Concepts concepts, Class<A> c, S field) {
  ret sortedByFieldAlphanumIC(field, concepts.list(c));
}