code: public List<TotalTargetCountActionStatus> getRolloutGroupStatus(final Long groupId) {
          final Cache cache = cacheManager.getCache(CACHE_GR_NAME);
  
          return retrieveFromCache(groupId, cache);
      }
docs: Retrieves cached list of {@link TotalTargetCountActionStatus} of
  {@link RolloutGroup}.
  
  @param groupId
  to retrieve cache entries for
  @return map of cached entries