@Bean
	@Scope("prototype")
	@ConditionalOnMissingBean
	@ConditionalOnProperty(name = "feign.sentinel.enabled")
	public Feign.Builder feignSentinelBuilder() {
		return SentinelFeign.builder();
	}
@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/feign/SentinelFeignAutoConfiguration.java