def show_security_group_rule(self, security_group_rule, **_params):
        try:
            return {'security_group_rule':
                    self._fake_security_group_rules[security_group_rule]}
        except KeyError:
            msg = 'Security Group rule %s not found' % security_group_rule
            raise n_exc.NeutronClientException(message=msg, status_code=404)
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/tests/unit/api/openstack/compute/test_neutron_security_groups.py/MockClient.show_security_group_rule/original