docs: function () {
      // clear the action queue
      this.actionQueue = [];
      
      // kill the session
      var promise = this.webdriverClient.deleteSession();
  
      // emit the run.complete event
      promise.then(function () {
        this.events.emit('driver:message', {key: 'run.complete', value: null});
      }.bind(this));
  
      return this;
    }