private void checkNoConsumers(String queueName, Map<String, Object> queue) {
		if (!queue.get("consumers").equals(Integer.valueOf(0))) {
			throw new RabbitAdminException("Queue " + queueName + " is in use");
		}
	}
Implementation of {@link BusCleaner} for the {@code RabbitMessageBus}.

@author Gary Russell
@since 1.2
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/integration/bus/rabbit/RabbitBusCleaner.java