public void setSecretKey(String secretKey) {
		this.secretKey = secretKey;
	}
Offset persistent interval for consumer.
see{@link MQClientInstance#startScheduledTask()},eg:ScheduledTask
sendHeartbeatToAllBroker .
spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/properties/RocketMQCommonProperties.java