Creating a PSR-3 Logger using the configuration

I am trying to create a PSR-3 logger using the configuration and PsrLoggerAbstractServiceFactory as described in the documentation but neither PHPStorm nor searching for the class in the GitHub repository returns any results.
I thought I’d ask here before creating a new issue over at GitHub.

Documentation:

The name is Laminas\Log\PsrLoggerAbstractAdapterFactory: