airplayutil?

I filed a bug report about AirPlay on developer.apple.com and they replied


More airplay logs would be useful as well. This can be enabled by:

> airplayutil logging +HTTPClient:level=chatty

> airplayutil logging +HTTPServer:level=chatty


What is airplayutil and how to I install it? This was a bug report about a problem with the HomePod airplay. I asked them to clarify a week ago but they haven't responded.