public static Criterion matchEthType(int ethType) {
        return new EthTypeCriterion(ethType);
    }
@Test
    public void testMatchEthTypeMethod() {
        EthType ethType = new EthType(12);
        Criterion matchEthType = Criteria.matchEthType(new EthType(12));
        EthTypeCriterion ethTypeCriterion =
                checkAndConvert(matchEthType,
                                Criterion.Type.ETH_TYPE,
                                EthTypeCriterion.class);
        assertThat(ethTypeCriterion.ethType(), is(equalTo(ethType)));
    }