why I cannot find The AWS Security Token Service (STS) at java sdk 2.0？

[HungFoolishry]

2.0：https://docs.aws.amazon.com/zh_cn/sdk-for-java/v2/developer-guide/advanced-topics.html
but I can find it at 1.0 https://docs.aws.amazon.com/zh_cn/sdk-for-java/v1/developer-guide/prog-services-sts.html

is 2.0 not support for STS？