docs: public Closeable decrementOnceCloseable()
    {
      AtomicBoolean decremented = new AtomicBoolean(false);
      return () -> {
        if (decremented.compareAndSet(false, true)) {
          decrement();
        } else {
          log.warn("close() is called more than once on ReferenceCountingSegment.decrementOnceCloseable()");
        }
      };
    }