title: Smartgwt collapse / expand all listgrid records
body: <p>I have a listgrid like this:
  <a href="http://www.smartclient.com/smartgwt/showcase/#grid_nested_form" rel="nofollow">http://www.smartclient.com/smartgwt/showcase/#grid_nested_form</a></p>
  
  <p>It appears a form when I click expand button. </p>
  
  <p>Is there some way to expand only one element? In another words, fire collapse event of all records of my listgrid except the one I have selected.</p>
  
  <p>Thanks a lot!</p>