We are using Activiti 184.108.40.206 packaged inside a Grails 3 application. I have customized the session manager with my own implementations of the 220.127.116.11 SessionFactory according to the 18.104.22.168 documentation. It worked well in 22.214.171.124. I am attempting to upgrade my application to use the Activiti 6.0.0 engine. When I look at the 6.0.0 session documentation, I see similar instructions to the 126.96.36.199, but the import of the GroupIdentityManager class reference in the 6.0.0 documentation does not exist in the 6.0.0 source code (I downloaded the source code). It seems that the 6.0.0 documentation wasn't updated? Is there someplace else in the documentation I should look, or perhaps some unit/integration tests showing a custom User/Group session manager that corresponds to the 6.0.0 engine? We are rolling out a software implementation in June, and I'd like to get our application to Activiti 6.0.0 ASAP. I'd really appreciate a documented example of how to port my code to 6.0.0. I do see a GroupDataManager class, but I am unclear if this is the correct class, and how to do the bean wiring configuration (Spring in our case) for the processEngineConfiguration.