      *
      *  @param preserveDurable - when true, durable JMS subscriptions are not destroyed
 	 * 		allowing consumers to later resubscribe and receive missed messages
+	 *  
+	 *  @langversion 3.0
+	 *  @playerversion Flash 9
+	 *  @playerversion AIR 1.1
+	 *  @productversion BlazeDS 4
+	 *  @productversion LCDS 3 
 	 */
 	public function unsubscribe(preserveDurable:Boolean = false):void
 	{

	 * 			allowing consumers to later resubscribe and receive missed messages
	 *
	 *  @return The unsubscribe CommandMessage.
	 */
	protected function buildUnsubscribeMessage(preserveDurable:Boolean):CommandMessage
	{

            /*
             * Command messages are handled internally by the Consumer and
             * are not dispatched to message listeners via MessageEvents.
             *  
             *  @langversion 3.0
             *  @playerversion Flash 9
             *  @playerversion AIR 1.1
             *  @productversion BlazeDS 4
             *  @productversion LCDS 3 
             */
            return;
        }
