<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def stop(self):

 """Tell the SocketIO thread to terminate."""

        if self._thread:
            _LOGGER.info("Stopping SocketIO thread...")

            # pylint: disable=W0212
            self._running = False

            if self._exit_event:
                self._exit_event.set()

            self._thread.join()