docs: private String getCacheNamePrefix() {
          String cacheNamePrefix = getPrefix(
                  isDefaultURI ? null : uri,
                  isDefaultClassLoader ? null : getClassLoader());
          if (cacheNamePrefix == null) {
              return HazelcastCacheManager.CACHE_MANAGER_PREFIX;
          } else {
              return HazelcastCacheManager.CACHE_MANAGER_PREFIX + cacheNamePrefix;
          }
      }