stSelectRow doesn't work with ajax datasource

[fastwit]

the issue appears in the following code, safeCopy is an empty array when stPipe is used

 this.select = function select(row, mode) {
      var rows = safeCopy;
      var index = rows.indexOf(row);
      if (index !== -1) {
        if (mode === 'single') {
          row.isSelected = row.isSelected !== true;
          if (lastSelected) {
            lastSelected.isSelected = false;
          }
          lastSelected = row.isSelected === true ? row : undefined;
        } else {
          rows[index].isSelected = !rows[index].isSelected;
        }
      }
    };