lib/rtm-client.js
function(args) {
    var mqttClient = this.mqttClient;
    return promised(function(cb) {
      mqttClient.subscribe(args.channel, _getPahoCallbacks(cb));
    });
  }
function(args) {
    var mqttClient = this.mqttClient;
    return promised(function(cb) {
      mqttClient.subscribe(args.channel, _getPahoCallbacks(cb));
    });
  }
function ( args ) { var mqttClient = this . mqttClient ; return promised ( function ( cb ) { mqttClient . subscribe ( args . channel , _getPahoCallbacks ( cb ) ) ; } ) ; }
Subscribe to rtm channel.

@param {Object} args
@param {String} args.channel
@return {Promise}
Subscribe to rtm channel .