I was going to say, do this:

```ruby
return @app.call(env) if env['REQUEST_METHOD'] == 'GET'
```

But technically, even that's not correct, because GET request can have bodies too, even though they usually don't. So ditch this line entirely.

(We'd want a generic modernizer to apply to all use cases, not just SDK requests. For example, what if we want to modernize requests from the dashboard, too?)