def add_service_subnet(self, context_id, subnet_id):
        """Adds a service subnet to a tunnel context.

        :param int context_id: The id-value representing the context instance.
        :param int subnet_id: The id-value representing the service subnet.
        :return bool: True if service subnet addition was successful.
        """
        return self.context.addServiceSubnetToNetworkTunnel(subnet_id,
                                                            id=context_id)
Adds a service subnet to a tunnel context.

        :param int context_id: The id-value representing the context instance.
        :param int subnet_id: The id-value representing the service subnet.
        :return bool: True if service subnet addition was successful.