def METHOD_NAME(self):
    """
    Ensure no sequence number is labeled, when it cannot be found
    :return:
    """
    alice = Participant("Alice", address_hex="dead")
    bob = Participant("Bob", address_hex="beef")
    mb = MessageTypeBuilder("protocol_with_one_message_type")
    mb.add_label(FieldType.Function.PREAMBLE, 8)
    mb.add_label(FieldType.Function.SYNC, 16)
    mb.add_label(FieldType.Function.LENGTH, 8)
    mb.add_label(FieldType.Function.SRC_ADDRESS, 16)
    mb.add_label(FieldType.Function.DST_ADDRESS, 16)
    num_messages = 3
    pg = ProtocolGenerator([mb.message_type],
                           syncs_by_mt={mb.message_type: "0x1337"},
                           participants=[alice, bob])
    for i in range(num_messages):
        if i % 2 == 0:
            source, destination = alice, bob
        else:
            source, destination = bob, alice
        pg.generate_message(data="", source=source, destination=destination)
    #self.save_protocol("protocol_1", pg)
    # Delete message type information -> no prior knowledge
    self.clear_message_types(pg.protocol.messages)
    ff = FormatFinder(pg.protocol.messages)
    ff.known_participant_addresses.clear()
    ff.perform_iteration()
    self.assertEqual(len(ff.message_types), 1)
    self.assertEqual(ff.message_types[0].num_labels_with_type(FieldType.Function.SEQUENCE_NUMBER), 0)