public String toStringNoColon() {
        final StringBuilder builder = new StringBuilder();
        for (final byte b : this.address) {
            builder.append(String.format("%02X", b & 0xFF));
        }
        return builder.toString();
    }
@Test
    public void testToStringNoColon() throws Exception {
        assertEquals(MAC_ONOS_STR_NO_COLON, MAC_ONOS.toStringNoColon());
    }