public boolean destroy() {
        if (!destroyed.getAndSet(true)) {
            if (slobroksConfig != null) {
                slobroksConfig.shutdown();
            }
            register.shutdown();
            mirror.shutdown();
            listener.shutdown().join();
            orb.transport().shutdown().join();
            targetPool.flushTargets(true);
            executor.shutdown();
            return true;
        }
        return false;
    }
Sets the destroyed flag to true. The very first time this method is called, it cleans up all its dependencies.
Even if you retain a reference to this object, all of its content is allowed to be garbage collected.

@return true if content existed and was destroyed
messagebus/src/main/java/com/yahoo/messagebus/network/rpc/RPCNetwork.java