code: public static Single<Set<String>> values(CacheConfigBean cacheConfigBean, String key) {
          return SingleRxXian.call(CacheService.CACHE_SERVICE, "cacheSetMembers", new JSONObject() {{
              put("cacheConfig", cacheConfigBean);
              put("key", key);
          }}).map(unitResponseObject -> {
              unitResponseObject.throwExceptionIfNotSuccess();
              return Reflection.toTypedSet(unitResponseObject.getData(), String.class);
          });
      }
docs: retrial the cached set
  
  @param cacheConfigBean the datasource configuration
  @param key             the key
  @return the value set