apollo-client/src/main/java/com/ctrip/framework/apollo/spring/spi/DefaultConfigPropertySourcesProcessorHelper.java/DefaultConfigPropertySourcesProcessorHelper/processSpringValueDefinition
class DefaultConfigPropertySourcesProcessorHelper:  private void processSpringValueDefinition(BeanDefinitionRegistry registry) {
    SpringValueDefinitionProcessor springValueDefinitionProcessor = new SpringValueDefinitionProcessor();

    springValueDefinitionProcessor.postProcessBeanDefinitionRegistry(registry);
  }