anchor.diff:                      if ($response.length) {
                           this._displaySnapshotSelect($response.find('Snapshots:eq(0) Snapshot'));
                       }
  -                    this.loaders.fetchSnapshots.addClass('hidden');
  +                    this.loaders.fetchSnapshots.addClass('message_hidden');
   
                       if (_.isFunction(callback)) {
                           callback.call(this);
  
positive.code:         }
      };
  </script>
  
  <table class="runnerFormTable">
    <tr>
  
negative.code: 
              this.$fetchOptionsButton.attr('disabled', true);
              $loader.insertAfter(this.$fetchOptionsButton);
              this.loaders.fetchOptions.removeClass('message_hidden');
              this.$dialogSubmitButton.prop('disabled', true);
  
              BS.ajaxRequest(this.refreshOptionsUrl, {
  