private ReferenceEditorComboWithBrowseButton createPackageChooser() {
    final ReferenceEditorComboWithBrowseButton packageChooser =
      new PackageNameReferenceEditorCombo("", myProject, RECENTS_KEY, RefactoringBundle.message("choose.destination.package"));
    final Document document = packageChooser.getChildComponent().getDocument();
    document.addDocumentListener(new DocumentListener() {
      @Override
      public void documentChanged(@NotNull DocumentEvent e) {
        validateButtons();
      }
    });

    return packageChooser;
  }
private ReferenceEditorComboWithBrowseButton createPackageChooser()