         super.init(queue: queue)
     }
     
+    /**:name: Barriers */
     
     /**
         Dispatches a barrier block asynchronously on this queue. This method will return immediately.

*/
public class ConcurrentQueue : DispatchQueue {
  

    /**
        Designated initializer to create a new concurrent queue.
    

        dispatch_barrier_sync(queue, block)
    }
    
    
    /**:name: Iterations */
    
    /**
        Executes the block on this queue for number of iterations passed to it. The block may execute for
