@Override
    public void getConfig(SentinelConfig.Builder builder) {
        // TODO (MAJOR_RELEASE): This shouldn't really be here, but we need to make sure users can upgrade if we change sentinel to use hosts/<hostname>/sentinel instead of hosts/<hostname>
        // as config id. We should probably wait for a major release
        if (configSentinel != null) {
            configSentinel.getConfig(builder);
        }
    }
Returns the string representation of this Host object.
config-model/src/main/java/com/yahoo/vespa/model/Host.java