/**
  * Deletes a <tt>WhiteboardShape</tt> from the white-board.
  *
  * @param wbSession the white-board session, to which the object belongs
  * @param ws the shape to delete
  */
 public void deleteWhiteboardObject(WhiteboardSession wbSession, WhiteboardShape ws) {
   try {
     wbSession.deleteWhiteboardObject(ws);
   } catch (OperationFailedException ex) {
     ex.printStackTrace();
   }
 }