Does GNATCOLL.traces exist?

Whenever I look up logging in Ada, one of the recommendations is GNATCOLL.Traces. I can see the documentation for it but there is no code. If I try something like

with GNATCOLL.Traces;

I get an error. If I tell alr

alr with gnatcoll_traces

It says gnatcoll.traces does not exist. I have found a logging system that works in utilada (Util.Log.Loggers) but I keep wondering

• Where is the code for GNATCOLL.Traces. On Linux, what do I need to install to use it?
• It must have existed at one time: https://stackoverflow.com/a/25404890/2041317 talks about colourizing it
• Has it been superseded by something else

It should be part of GNATCOLL Core packages, so just do a

alr with gnatcoll