public static Criterion matchMplsLabel(MplsLabel mplsLabel) {
        return new MplsCriterion(mplsLabel);
    }
@Test
    public void testMatchMplsLabelMethod() {
        Criterion matchMplsLabel = Criteria.matchMplsLabel(mpls1);
        MplsCriterion mplsCriterion =
                checkAndConvert(matchMplsLabel,
                                Criterion.Type.MPLS_LABEL,
                                MplsCriterion.class);
        assertThat(mplsCriterion.label(), is(equalTo(mpls1)));
    }