public static Criterion matchIPv6FlowLabel(int flowLabel) {
        return new IPv6FlowLabelCriterion(flowLabel);
    }
@Test
    public void testMatchIPv6FlowLabelMethod() {
        int flowLabel = 12;
        Criterion matchFlowLabel = Criteria.matchIPv6FlowLabel(flowLabel);
        IPv6FlowLabelCriterion flowLabelCriterion =
                checkAndConvert(matchFlowLabel,
                                Criterion.Type.IPV6_FLABEL,
                                IPv6FlowLabelCriterion.class);
        assertThat(flowLabelCriterion.flowLabel(), is(equalTo(flowLabel)));
    }