private static String asString(LoadBalancer.State state) {
        return switch (state) {
            case active -> "active";
            case inactive -> "inactive";
            case reserved -> "reserved";
            case removable -> "removable";
        };
    }
Serializer for load balancers.

@author mpolden
node-repository/src/main/java/com/yahoo/vespa/hosted/provision/persistence/LoadBalancerSerializer.java