### Question:
OxmIpv6NdSllSerializer extends AbstractOxmMacAddressSerializer { @Override protected int getOxmFieldCode() { return OxmMatchConstants.IPV6_ND_SLL; }  @Override void serialize(MatchEntry entry, ByteBuf outBuffer);  }### Answer:
@Test public void getOxmFieldCode() { assertEquals("Wrong oxm-class", OxmMatchConstants.IPV6_ND_SLL, serializer.getOxmFieldCode()); }