The Eclipse Tranformer project is a big part of people delivering Jakarta EE 9 and 10 runtimes. Many Jakarta EE vendors, such as Open Liberty, use Transformer to deliver support for both the jakarta and pre-jakarta namespaces from a single code base.
The project has added new support since it was first adopted for Jakarta EE implementations. There are now plugins for Bnd, new Maven plugins, and soon Gradle plugins. Come learn whats new and how to use Transformer in your project for dealing with the Jakarta EE namespace change as well as general shading use.