@Override
    public void handleRequestDone(Request request) {
        SetClusterStateRequest.Reply reply = getReply(request);
        this.request.setReply(reply);
        waiter.done(this.request);
    }
Waiter class for set cluster state RPC commands.
clustercontroller-core/src/main/java/com/yahoo/vespa/clustercontroller/core/rpc/RPCSetClusterStateWaiter.java