Koa2 examples of streaming?

I'm mostly interested in the stream-view and SSE examples. Thanks.

https://github.com/koajs/examples/blob/master/stream-view/view.js

Start with the linked stream-view/view.js example and inspect the repository's other Koa examples to determine how streaming and SSE are currently represented. The issue does not define whether to add, expand, or document examples, so confirm the intended scope before starting; done should include an agreed streaming/SSE example that runs with the repository.

Written by the indexing model from the issue text.