code: function TX(client, channel){
    EE.call(this);
    this.client = client;
    this.channel = channel;
    this.id = channel.$getId();
  
    return this;
  }
docs: Work with transactions.
  
  The Tx class allows publish and ack operations to be batched into atomic units of work.
  The intention is that all publish and ack requests issued within a transaction will
  complete successfully or none of them will.
  Servers SHOULD implement atomic transactions at least where all publish or ack requests
  affect a single queue. Transactions that cover multiple queues may be non-atomic,
  given that queues can be created and destroyed asynchronously, and such events do not
  form part of any transaction. Further, the behaviour of transactions with respect to the
  immediate and mandatory flags on Basic.Publish methods is not defined.
  @extends EventEmitter
  @param {BRAMQPClient} client Client object that returns from bramqp#openAMQPCommunication() method.
  @param {Channel} channel Channel object (should be opened).
  @return {TX}
  @constructor
  @class Tx