@TestOnly
  public String[] getVisibleFiles() {
    final ComboBoxModel<FileDescriptor> model = myFileChooser.getModel();
    String[] result = new String[model.getSize()];
    for (int i = 0; i < model.getSize(); i++) {
      FileDescriptor o = model.getElementAt(i);
      result[i] = o.element.getPresentableText();
    }
    return result;
  }
@TestOnly
  public String[] getVisibleFiles()