What is Google's Plan for Java Development on App Engine?

[MikeDee]

what are Google's plans for Java development on App Engine? Last year Google stopped supporting Java 8 on App Engine. They killed the GCP plugin for Eclipse. The only option seemed to be to use IntelliJ with Cloud Code for Java 11+ development on App Engine Standard. 

Now there are conflicting messages. Here is Google Cloud Code in IntelliJ. This makes absolutely no sense. It says App Engine Deployments to Java 8 will be deprecated soon.

First, we use Java 11. So I don't even know why this appears in IntelliJ. Second, Google hasn't supported Java 8 in almost a year. So why is it even posting this message. 🙄

Google's own documentation is contradictory. On "Create an app for the App Engine Standard Environment in Cloud Code for IntelliJ", Google says only Java 8 is supported with Cloud Code? 🙃

https://cloud.google.com/code/docs/intellij/create-standard

What should Java developers use to code on App Engine Standard? How do we deploy? IntelliJ with Cloud Code doesn't work? How do we debug and test locally?