@Override
  @Nullable
  protected JComponent createCenterPanel() {
    JComponent root;
    if (myInputOptions != null && myOutputOptions != null) {
      root = new JBTabbedPane();
      ((JTabbedPane)root).addTab(CommonBundle.message("title.input"), myInputOptions.getRoot());
      ((JTabbedPane)root).addTab(CommonBundle.message("title.output"), myOutputOptions.getRoot());
    } else if (myInputOptions != null) {
      root = myInputOptions.getRoot();
    } else {
      root = myOutputOptions.getRoot();
    }
    return root;
  }
@Override
  @Nullable
  protected JComponent createCenterPanel()