engine.NewPrefixMapper(SnakeMapper{}, "prefix") can add prefix string when naming based on SnakeMapper or SameMapper, or you custom Mapper.engine.NewPrefixMapper(SnakeMapper{}, "suffix") can add suffix string when naming based on SnakeMapper or SameMapper, or you custom Mapper.engine.NewCacheMapper(SnakeMapper{}) add naming Mapper for memory cache.Of course, you can implement IMapper to make custom naming strategy.