cannot compile

```
java: cannot find symbol
  symbol:   method getSelectedIndices()
  location: variable model of type javax.swing.ListSelectionModel
```

from here : 
```
  public int[] getSelectedTackIndices()
  {
    ListSelectionModel model = tacksTable.getSelectionModel();
    int[] indices = model.getSelectedIndices();
    return indices;
  }
```