apollo-client-config-data/src/main/java/com/ctrip/framework/apollo/config/data/extension/initialize/ApolloClientPropertiesFactory.java/ApolloClientPropertiesFactory/createApolloClientProperties
class ApolloClientPropertiesFactory:  public ApolloClientProperties createApolloClientProperties(
      Binder binder,
      BindHandler bindHandler) {
    return binder.bind(PROPERTIES_PREFIX,
        Bindable.of(ApolloClientProperties.class), bindHandler).orElse(null);
  }