'Get NAT rules for the network domain
:param  network_domain: The network domain the rules belongs to
:type   network_domain: :class:`DimensionDataNetworkDomain`
:rtype: ``list`` of :class:`DimensionDataNatRule`'

def ex_list_nat_rules(self, network_domain):

    params = {}
    params['networkDomainId'] = network_domain.id
    response = self.connection.request_with_orgId_api_2('network/natRule', params=params).object
    return self._to_nat_rules(response, network_domain)
