code: def enable(self):
          
          with self._lock:
              if self._event_listener_thread is None:
                  self._event_listener_thread = WVAEventListenerThread(self, self._http_client)
                  self._event_listener_thread.start()
docs: Enable the stream thread
  
          This operation will ensure that the thread that is responsible
          for connecting to the WVA and triggering event callbacks is started.
          This thread will continue to run and do what it needs to do to
          maintain a connection to the WVA.
  
          The status of the thread can be monitored by calling :meth:`get_status`.