No. This example covers how to use the config service. You (probably) wouldn’t use the config service to do that
You can use whatever method you want to send a control signal to an extension.
Twitch provides the “Extension PubSub Message” system to make it eaiser to do this, but you don’t have to use it.
I don’t have an example that just sends a PubSub message since thats only a single call, and the config_service example describes a set of steps/proceedure to perform a config service update and push that to running instances (since config service updating doesn’t call the config service onChanged JS function)
You can however use the example to extract just the pubsub send call from it, or use the docs linked above to construct your own call.