docs: def tear_down(self):
          """Tear down the virtual box machine
          """
  
          if not self.browser_config.get('terminate'):
              self.warning_log("Skipping terminate")
              return
  
          self.info_log("Tearing down")
  
          if self.browser_config.get('platform').lower() == 'linux':
              self.execute_command("shutdown -h now", username='root')
  
          elif self.browser_config.get('platform').lower() == 'windows':
              self.session.console.power_down()