2023
https://www.unlogged.io/post/all-you-need-to-know-about-java21
https://habr.com/ru/articles/762084/
Java - Java 21 Tool Enhancements: Better Across the Board 17:38
    https://www.youtube.com/watch?v=nFJBVuaIsRg
https://habr.com/ru/post/721714/