code: function (host, done_cb, secure) {
      // Initializes the object that stores subscriptions
      this.subscriptions = {};
      // Initializes the object that holds the internal client
      this.client = {};
      // Functions backlog
      this.backlog = [];
      // Connect
      this.client = connectBrowser(this.subscriptions, this.backlog, host, done_cb, secure);
  }
docs: Defines a Simple MQTT client.
  
  @param {string} host - the hostname of the broker.
  @param {function} [err_cb] - optional callback fired whenever an error occurs