title: Flex AdvancedDataGrid hierarchical view itemrenderer
body: <p>I display hierarchical data in my AdvancedDatagrid. I have set a checkbox as itemrenderer for the column which displays the hierarchical .Each leaf node in the view has checkbox next to it. 
  Suppose group A node has A1, A2, A3 etc as child nodes and group B has B1, B2 etc as child nodes. All child nodes ie leaf nodes will have checkbox next to it. If I select any of the check box under group A automatically the checkboxes under other groups should be disabled and on uncheck of checkbox it should enable. </p>
  
  <p>Please let me know as how to achieve it.</p>