return doTransaction(shardDataTree, snapshot -> {
snapshot.merge(CarsModel.BASE_PATH, CarsModel.emptyContainer());
snapshot.merge(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());
return doTransaction(shardDataTree, snapshot -> {
snapshot.merge(CarsModel.BASE_PATH, CarsModel.emptyContainer());
snapshot.merge(CarsModel.CAR_LIST_PATH, CarsModel.newCarMapNode());