As noticed in 15.1.0 release,

Spring Security and Boot adapter deprecation

A long time ago, with Spring Security 5.0, there is now native support for OAuth 2.0 and OpenID Connect in Spring. With this in mind now is the time to start deprecating our Spring Boot and Security adapters.

I noted that the last version of Keycloak Admin REST Client is for 15.0.2. Then, my question is: All the Keycloak java libs were deprecated?