@PostConstruct
	public void init() {
		blockRequestHandler.ifPresent(WebFluxCallbackManager::setBlockHandler);
	}
@author <a href="mailto:fangjian0423@gmail.com">Jim</a>
spring-cloud-alibaba-starters/spring-cloud-starter-alibaba-sentinel/src/main/java/com/alibaba/cloud/sentinel/SentinelWebFluxAutoConfiguration.java