code: def on_start(self, session, session_context):
          
          session_id = session.session_id
          web_registry = session_context['web_registry']
  
          if self.is_session_id_cookie_enabled:
              web_registry.session_id = session_id
              logger.debug("Set SessionID cookie using id: " + str(session_id))
  
          else:
              msg = ("Session ID cookie is disabled.  No cookie has been set for "
                     "new session with id: " + str(session_id))
              logger.debug(msg)
docs: Stores the Session's ID, usually as a Cookie, to associate with future
          requests.
  
          :param session: the session that was just ``createSession`` created