def shut_down_selenium_server(self):
self.do_command("<STR_LIT>", [])<EOL>
Kills the running Selenium Server and all browser sessions.  After you run this command, you will no longer be able to send
commands to the server; you can't remotely start the server once it has been stopped.  Normally
you should prefer to run the "stop" command, which terminates the current browser session, rather than
shutting down the entire server.