Yeah, I'm not sure I get it either. More power to the author for solving a problem they may have, but I have yet, in my 20+ years experience with Java, had a need to do this kind of code embedding in the source code (whether in comments or not). Sure, it's nice to be able to run other languages at run-time (e.g. GraalVM, etc), but is there really a need to have this kind of language interoperability at compile time?