public Boolean store_user(User u) {
   return hbConf.store_user(u);
 }
 public void store_extras(List<Extra> list) {
   hbConf.store_extras(list);
 }
 public List<User> get_users() {
   return hbConf.get_users();
 }
 public List<Extra> get_extras() {
   return hbConf.get_extras();
 }
 public void store_reductions(List<Reduction> list) {
   hbConf.store_reductions(list);
 }
 public List<Reduction> get_reductions() {
   return hbConf.get_reductions();
 }
 public void store_pricelist(List<Price> list) {
   hbConf.store_pricelist(list);
 }
 public List<Price> get_pricelist() {
   return hbConf.get_pricelist();
 }