/** Adds a listener for ok + cancel button events */
 public void addButtonListener(IXfsBrowserListener listener) {
   browser.addButtonListener(listener);
 }
 /** Removes a listener for ok + cancel button events */
 public void removeButtonListener(IXfsBrowserListener listener) {
   browser.removeButtonListener(listener);
 }
 /**
  * Adds a file filter to the browser. If ok button is clicked and selected file is filtered, a
  * warning will be shown and call is not delegated to listeners.
  */
 public void addFileSelectFilter(IXfsFileFilter filter) {
   browser.addFileSelectFilter(filter);
 }