code: public Map<String, String> getParametersToMap(Map<String, String> map) {
          if (map == null) map = new LinkedHashMap<>();
          final Map<String, String> map0 = map;
          getParameters().forEach((k, v) -> map0.put(k, v));
          return map0;
      }
docs: 将请求参数转换成Map
  
  @param map Map
  
  @return Map