Configuring for multi-project builds

I have a multi-project build with a top-level `build.gradle` and then subprojects, including Kotlin subprojects, that do *not* have individual `build.gradle` files.

Is there a way to configure `launch.json` in Visual Studio Code to cope with that project structure in order to debug one or more of the subprojects?

Start with the top-level build.gradle, the Kotlin subprojects without individual build.gradle files, and the launch.json configuration in Visual Studio Code. Determine how the existing adapter discovers projects and what configuration is needed to debug one or more subprojects. Done means a documented launch.json setup works for this multi-project structure.

Written by the indexing model from the issue text.