They are not part of the software.
Theoretical yes. So the generated test build is a stand-alone app. But that is nothing more then a GUI, print out value changes from the controllers to stdout. The wrapper file to archive that is this one: https://github.com/brummer10/XUiDesigne ... ui_test.cc
To implement a option to generate a jack/alsa aware applications, for example, is just a question of writing a wrapper file for that purpose.