public void saveCollection(Collection collection) { collectionDao.save(collection); }
public void removeCollection(String collectionId) { collectionDao.remove(collectionId); }
public List<Collection> findHiddenCollections() { return collectionDao.findHiddenCollections(); }
public List<Collection> findVisibleCollections() { return collectionDao.findVisibleCollections(); }
public List<Collection> findAllCollections() { return collectionDao.findAllCollections(); }
public Collection getCollection(String id) { return collectionDao.get(id); }