apollo-client/src/main/java/com/ctrip/framework/apollo/util/ConfigUtil.java/ConfigUtil/initPropertiesOrdered
class ConfigUtil:  private void initPropertiesOrdered() {
    String enablePropertiesOrdered = System.getProperty(APOLLO_PROPERTY_ORDER_ENABLE);

    if (Strings.isNullOrEmpty(enablePropertiesOrdered)) {
      enablePropertiesOrdered = Foundation.app().getProperty(APOLLO_PROPERTY_ORDER_ENABLE, "false");
    }

    if (!Strings.isNullOrEmpty(enablePropertiesOrdered)) {
      try {
        propertiesOrdered = Boolean.parseBoolean(enablePropertiesOrdered);
      } catch (Throwable ex) {
        logger.warn("Config for {} is invalid: {}, set default value: false",
            APOLLO_PROPERTY_ORDER_ENABLE, enablePropertiesOrdered);
      }
    }
  }