server/models/transaction.js
//
// Copyright 2014-2016 Ilkka Oksanen <iao@iki.fi>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an "AS
// IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
// express or implied. See the License for the specific language
// governing permissions and limitations under the License.
//
// exports.transaction = function(tr) {
//
// }
// transaction.start(tr => {
// user.set('foo', 42, tr);
// friend.set('bar', 1, tr);
// });