add function to get predefined exchange

Author: David Kamphausen

src/FintechFab/LaravelQueueRabbitMQ/Queue/RabbitMQQueue.php

@@ -160,6 +160,13 @@ public function getChannel()
 		return new AMQPChannel($this->connection);
 	}
 
+	/**
+	 * @return AMQPExchange
+	 */
+	public function getCurrentExchange() {
+		return $this->exchange;
+	}
+
 	/**
 	 * @param AMQPChannel $channel
 	 *
@@ -227,4 +234,4 @@ public function declareDelayedQueue($destination, $delay)
 		return $queue;
 	}
 
-}
+}