public LinkedMultiValueMap<String, String> toLinkedMultiValueMap(final String json) {
        return GsonUtils.getGson().fromJson(json, new TypeToken<LinkedMultiValueMap<String, String>>() {
        }.getType());
    }
To linked multiValue map.

@param json the json
@return the linked multiValue map
shenyu-plugin/shenyu-plugin-param-mapping/src/main/java/org/apache/shenyu/plugin/param/mapping/strategy/FormDataOperator.java