title: Datatable row expansion event
body: <p>I am using Primefaces 3.0 with JSF 2.0. I have a datatable with expansion enabled. I wanted to call a bean method when the user clicks on rowToggler. Basically I wanted to load the expansion details only when the user clicks the expand button. I can't see a server side callback for row expansion in the documentation. Please let me know if I can have any workaround for this problem.</p>
  
  <p>Thanks and Regards,
  Renju</p>