private RequestConfig buildRequestConfig() {
		RequestConfig.Builder requestConfigBuilder = RequestConfig.custom();
		if (timeoutProperties != null) {
			requestConfigBuilder.setConnectionRequestTimeout(
					Timeout.of(timeoutProperties.getConnectRequestTimeout(), TimeUnit.MILLISECONDS));
		}
		requestConfigCustomizers.forEach(customizer -> customizer.customize(requestConfigBuilder));
		return requestConfigBuilder.build();
	}
@deprecated in favour of
{@link DefaultEurekaClientHttpRequestFactorySupplier#DefaultEurekaClientHttpRequestFactorySupplier(TimeoutProperties, Set)}
spring-cloud-netflix-eureka-client/src/main/java/org/springframework/cloud/netflix/eureka/http/DefaultEurekaClientHttpRequestFactorySupplier.java