<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_event_stream(self):
 """Spawn a thread and monitor the Arlo Event Stream."""

        self.__event_handle = threading.Event()
        event_thread = threading.Thread(target=self.thread_function)
        event_thread.start()