default String divide(Integer a) {
		return divide(a, 0);
	}
Test that the default method calls the remote method is still a remote call.

@param a a
@return {@link String}
spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-consumer-sclb-example/src/main/java/com/alibaba/cloud/examples/feign/EchoClient.java