Ask HN: Source of an Van Emde Boas Tree Layout for Binary Search Trees impl

Hi all, where can I find the source code (preferably in Java or Kotlin) for a Van Emde Boas Tree Layout? As it's the best layout for arranging a static binary tree and even for an updatable binary tree I wanted to see a "real world" implementation. It's also okay to find an implementation in another language. kind regards Johannes