code: function (annotationContainer) {
  
      _session.publish(_this.publisher, function (error) {
        if (error) {
  
          // Let's write our own error message
          var customError = _.omit(error, 'message');
  
          if (error.code === 1500 && navigator.userAgent.indexOf('Firefox') !== -1) {
            $('#dialog-form-ff').toggle();
          } else {
  
            var errorMessage;
  
            if (error.code === 1010) {
              errorMessage = 'Check your network connection';
            } else {
              errorMessage = 'Error sharing the screen';
            }
  
            customError.message = errorMessage;
            _triggerEvent('screenSharingError', customError);
            _log(_logEventData.actionStart, _logEventData.variationError);
          }
        } else {
          if (_this.annotation && _this.externalWindow) {
            _accPack.linkAnnotation(_this.publisher, annotationContainer, _this.annotationWindow);
            _log(_logEventData.actionInitialize, _logEventData.variationSuccess);
          }
          _active = true;
          _triggerEvent('startScreenSharing', _this.publisher);
          _log(_logEventData.actionStart, _logEventData.variationSuccess);
        }
      });
  
    }
docs: Start publishing the screen
  @param annotationContainer