apollo-client/src/main/java/com/ctrip/framework/apollo/util/yaml/YamlParser.java/YamlParser/yamlToProperties
class YamlParser:  public Properties yamlToProperties(String yamlContent) {
    Yaml yaml = createYaml();
    final Properties result = propertiesFactory.getPropertiesInstance();
    process(new MatchCallback() {
      @Override
      public void process(Properties properties, Map<String, Object> map) {
        result.putAll(properties);
      }
    }, yaml, yamlContent);
    return result;
  }