@Override
	public int getOrder() {
		return LOWEST_PRECEDENCE;
	}
Copy from.
{@link BusEnvironmentPostProcessor#addOrReplace(MutablePropertySources, Map)}
@param propertySources {@link MutablePropertySources}
@param map Default RocketMQ Bus Properties
spring-cloud-alibaba-starters/spring-cloud-starter-bus-rocketmq/src/main/java/com/alibaba/cloud/bus/rocketmq/env/RocketMQBusEnvironmentPostProcessor.java