docs: def stop(self):
          """
          Terminate the WAMP session
  
          .. note::
              If the :meth:`AutobahnSync.run` has been run with ``blocking=True``,
              it will returns then.
          """
          if not self._started:
              raise NotRunningError("This AutobahnSync instance is not started")
          self._callbacks_runner.stop()
          self._started = False