sbool conceptsSortedByField_verbose;

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

static <A extends Concept> Cl<A> conceptsSortedByField(Concepts concepts, Class<A> c, S field) {
  // indexed
  IFieldIndex<A, O> index = concepts.getFieldIndex(c, field);
  if (index cast ConceptFieldIndexDesc)
    ret reverseInPlace(asList(index.objectIterator()));
    
  // sort manually
  if (conceptsSortedByField_verbose)
    print("conceptsSortedByField_verbose: Manual sort of " + c + " for " + field);
  ret sortedByField(field, concepts.list(c));
}