// classes must be concept classes
svoid ensureConceptClassesAreIndexed(Concepts cc default db_mainConcepts(), Cl<Class> classes) {
  fOr (Class c : classes)
    ensureConceptClassIsIndexed(cc, c);
}

svoid ensureConceptClassesAreIndexed(Concepts cc default db_mainConcepts(), Class... classes) {
  ensureConceptClassesAreIndexed(cc, asList(classes));
}