code: @Override
      public void export(ExportFormat format, int maxRows, ExportCallback callback) {
          if (dataSetHandler == null) {
              callback.noData();
          } else {
              Map<String,String> columnNameMap = new HashMap<>();
              displayerSettings.getColumnSettingsList().forEach(cs -> columnNameMap.put(cs.getColumnId(), cs.getColumnName()));
              dataSetHandler.exportCurrentDataSetLookup(format, maxRows, callback, columnNameMap);
          }
      }
docs: EXPORT