anchor.diff:    new SelectionModel<ImportBatch>.withList();
   
     void onSelectionChanged(dynamic test) {
  +    batch = batchSelection.selectedValues.first;
       refresh();
     }
   
  
positive.code:         if (batch != null) {
            results.addAll(
                (await _api.import.getImportBatchResults(batch.id)).items);
          }
        }, after: () async {
          pageControl.clearProgress();
  
negative.code: 
    final List<ImportBatch> batches = <ImportBatch>[];
  
    ImportBatch batch;
  
    ImportPage(PageControlService pageControl, this._api, this._auth,
        Router router)
  