/**
  * Handles the action.
  * 
  * @param GridField $gridField GridField to handle action for
  * @param array     $recordIDs Record IDs to handle action for
  * @param array     $data      Data to handle action for
  * 
  * @return void
  *
  * @author Sebastian Diel <*****@*****.**>
  * @since 14.03.2013
  */
 public function handle(GridField $gridField, $recordIDs, $data)
 {
     foreach ($recordIDs as $orderID) {
         $order = SilvercartOrder::get_by_id('SilvercartOrder', $orderID);
         if ($order->exists()) {
             $order->markAsNotSeen();
         }
     }
 }