@Override
    public Optional<String> getPreShutdownCommand() {
        var builder = new LogforwarderConfig.Builder();
        getConfig(builder);
        var cfg = new LogforwarderConfig(builder);
        var home = cfg.splunkHome();
        String cmd = "$ROOT/bin/vespa-logforwarder-start -S -c " + getConfigId();
        return Optional.of(cmd);
    }
@return The command used to start LogForwarder
config-model/src/main/java/com/yahoo/vespa/model/admin/LogForwarder.java