title: How to access root panel from widget in Google Web Toolkit (GWT)
body: <p>I have an entry point which handles
  My main layout including menu, header and etc.Also it
  has  rootpanel.get().add (login)
  at the end to show the login page (uibinder)</p>
  
  <p>Login.java uses uibinder and it works perfectly using RPC with server side class and I have got a reponse from database for user authentication which has been living on Google cloud sql. </p>
  
  <p>I am trying to redirect user after
  Login to the home page but my problem is I can not access Root panel from Login.java. 
  Basically I want to change the root panel from widget and redirect the user to the appropriate page based on log in result.
  Any help would be highly appreciated.
  Thanks</p>