def stop(self):
        super(UITask, self).stop()
        if self.app is not None:
            self.app.switchForm(None)
Verifies that the specified host is not known by the given user
dataset/ETHPy150Open facebook/sparts/sparts/tasks/tui.py/UITask.stop--crossover with--dataset/ETHPy150Open saltstack/salt/salt/states/ssh_known_hosts.py/absent