@Nullable
  private TrackingType getTrackingType(int row) {
    TypeInfo ref = (TypeInfo)getValueAt(row, convertColumnIndexToView(DiffViewTableModel.CLASSNAME_COLUMN_INDEX));
    return myInstancesTracker.getTrackingType(ref.name());
  }
@Nullable
  private TrackingType getTrackingType(int row)