private PopupChooserBuilder createInnerBuilder() {
    if (myChooserComponent instanceof JList) {
      return new MyPopupChooserBuilder((JList)myChooserComponent);
    }
    else if (myChooserComponent instanceof JTree) {
      return new MyPopupChooserBuilder((JTree)myChooserComponent);
    }
    throw new IllegalStateException("Incorrect chooser component: " + myChooserComponent);
  }
private PopupChooserBuilder createInnerBuilder()