apollo-client/src/main/java/com/ctrip/framework/apollo/util/factory/DefaultPropertiesFactory.java/DefaultPropertiesFactory/getPropertiesInstance
class DefaultPropertiesFactory:  @Override
  public Properties getPropertiesInstance() {
    if (m_configUtil.isPropertiesOrderEnabled()) {
      return new OrderedProperties();
    } else {
      return new Properties();
    }
  }