Can akka HttpHeader store an X-Request-ID or X-Correlation-ID Field?

I'm trying to store/lookup an X-Request-ID in an akka HttpRequest but HttpHeader doesn't appear to have an appropriate subclass.

Is it possible to access the X-Request-ID field, or X-Correlation-ID field, in an HttpHeader?

I found a related question concerning "custom headers" but I was hoping to not have to go that route...

Thank you in advance for your consideration and response.