docs: public CachedDbEntity getCachedEntity(Class<?> type, String id) {
      Class<?> cacheKey = cacheKeyMapping.getEntityCacheKey(type);
      Map<String, CachedDbEntity> entitiesByType = cachedEntites.get(cacheKey);
      if(entitiesByType != null) {
        return entitiesByType.get(id);
      } else {
        return null;
      }
    }