code: async def set_notification_level(self, level):
          
          await self._client.set_conversation_notification_level(
              hangouts_pb2.SetConversationNotificationLevelRequest(
                  request_header=self._client.get_request_header(),
                  conversation_id=hangouts_pb2.ConversationId(id=self.id_),
                  level=level,
              )
          )
docs: Set the notification level of this conversation.
  
          Args:
              level: ``NOTIFICATION_LEVEL_QUIET`` to disable notifications, or
                  ``NOTIFICATION_LEVEL_RING`` to enable them.
  
          Raises:
              .NetworkError: If the request fails.