docs: def config_program_reqs(cls, programs):
          """Run the program tester and determine if we can do anything."""
          cls._set_program_defaults(programs)
  
          do_png = cls.optipng or cls.pngout or cls.advpng
          do_jpeg = cls.mozjpeg or cls.jpegrescan or cls.jpegtran
  
          do_comics = cls.comics
  
          if not do_png and not do_jpeg and not do_comics:
              print("All optimizers are not available or disabled.")
              exit(1)