code: def close(self):
          ''' Close tunnel '''
          parent_pid = psutil.Process(self.tunnel.pid)
          child_pid = parent_pid.get_children(recursive=True)
          for pid in child_pid:
              pid.send_signal(signal.SIGTERM)
          self.is_open = Falsf close(self):
          ''' Close tunnel '''
          parent_pid = psutil.Process(self.tunnel.pid)
          child_pid = parent_pid.get_children(recursive=True)
          for pid in child_pid:
              pid.send_signal(signal.SIGTERM)
          self.is_open = False
docs: Close tunnel