code: def launch(self, args, unknown):
          
          pm = mayaplugins.MayaPluginManager.get()
          addon = pm.get_plugin(args.addon)
          isgui = isinstance(addon, coreplugins.JB_StandaloneGuiPlugin)
          print "Launching %s..." % args.addon
          addon.run()
          if isgui:
              app = guimain.get_qapp()
              sys.exit(app.exec_())
docs: Launch something according to the provided arguments
  
          :param args: arguments from the launch parser
          :type args: Namespace
          :param unknown: list of unknown arguments
          :type unknown: list
          :returns: None
          :rtype: None
          :raises: SystemExit