IQueueTPoll Method | 
| Name | Description | |
|---|---|---|
| Poll | 
            Retrieves and removes the head of this queue,
            or returns null if this queue is empty.
              | |
| Poll(Int64, TimeUnit) | 
            Retrieves and removes the head of this queue, waiting up to the
            specified wait time if necessary for an element to become available.
              |