EDIT

import java.util.Stack;

import java.util.UUID;

import org.apache.log4j.Logger;

import org.springframework.beans.factory.annotation.Autowired;

import org.vaadin.spring.events.EventScope;

     *

     */

    protected void refreshView(boolean doReload) {

        if(workingset == null){

            return; // nothing to do

        }