public Map<String, String> subtree(String string) {
    Map<String, String> ret = new HashMap<>();
    for (Entry<Object, Object> entry : getProps().entrySet()) {
      String key = (String) entry.getKey();
      String value = (String) entry.getValue();
      if (key.startsWith(string)) {
        ret.put(key.substring(string.length() + 1), value);
      }
    }
    return ret;
  }
@return true if HS2 webui query-info cache is enabled
common/src/java/org/apache/hadoop/hive/conf/HiveConf.java