def onLeave(self, details):
        """
        Implements :func:`autobahn.wamp.interfaces.ISession.onLeave`
        """
        if details.reason.startswith('wamp.error.'):
            self.log.error('{reason}: {wamp_message}', reason=details.reason, wamp_message=details.message)

        if self._transport:
            self.disconnect()

        exc = TransportLost()
        for requests in (self._call_reqs, self._publish_reqs, self._subscribe_reqs,
                         self._unsubscribe_reqs, self._register_reqs, self._unregister_reqs):
            for request in requests.values():
                txaio.reject(request.on_reply, exc)

            requests.clear()
        # do we ever call onLeave with a valid transport?