private synchronized void unregisterInSlobrok() {
        if (slobrokRegistrator != null) {
            slobrokRegistrator.shutdown();
            slobrokRegistrator = null;
        }
        if (acceptor != null) {
            acceptor.shutdown().join();
            acceptor = null;
        }
    }
Do not delete this method even if it's empty.
Calling this methods forces this class to be loaded,
which runs the static block.
container-disc/src/main/java/com/yahoo/container/jdisc/ConfiguredApplication.java