ReferenceConfigCache class was removed since 3.0?

As I see, the dubbo website doc 3.0 , the cache util of reference object 'ReferenceConfigCache' is there. but I cannot find the class in dubbo version 3.0.5, so I think this is out of past

Start with the Dubbo 3.0 website documentation entry for ReferenceConfigCache and compare its claim with the Dubbo 3.0.5 API or source entry for that class. Done means determining whether the documentation is outdated or the class is missing, then recording the correction needed in the website documentation.

Written by the indexing model from the issue text.