code: public static Completable clear(CacheConfigBean cacheConfigBean, String cacheKey) {
          return SingleRxXian.call(CacheService.CACHE_SERVICE, "cacheListClear", new JSONObject() {{
              put("cacheConfig", cacheConfigBean);
              put("key", cacheKey);
          }}).toCompletable();
      }
docs: clear the specified cached list.
  
  @param cacheConfigBean the data source of the cache system.
  @param cacheKey        the key for the cached list.
  @return the completable which tells you this operation is completed.