public static String anonymousGroup(final String destination) {
		return RocketMQConst.DEFAULT_GROUP + "_" + destination;
	}
generate anonymous group.
@param destination not null
@return anonymous group name.
spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/utils/RocketMQUtils.java