def METHOD_NAME(self):
    # http://bob.nem.ninja:8765/#/aggregate/1fbdae5ba753e68af270930413ae90f671eb8ab58988116684bac0abd5726584
    m = _create_msg(NEM_NETWORK_TESTNET, 6542254, 40000000, 6545854, 4, 2)
    t = serialize_aggregate_modification(
        m.transaction,
        m.aggregate_modification,
        unhexlify(
            "6bf7849c1eec6a2002995cc457dc00c4e29bad5c88de63f51e42dfdcd7b2131d"
        ),
    )
    write_cosignatory_modification(
        t,
        1,
        unhexlify(
            "5f53d076c8c3ec3110b98364bc423092c3ec2be2b1b3c40fd8ab68d54fa39295"
        ),
    )
    write_cosignatory_modification(
        t,
        1,
        unhexlify(
            "9eb199c2b4d406f64cb7aa5b2b0815264b56ba8fe44d558a6cb423a31a33c4c2"
        ),
    )
    write_cosignatory_modification(
        t,
        1,
        unhexlify(
            "94b2323dab23a3faba24fa6ddda0ece4fbb06acfedd74e76ad9fae38d006882b"
        ),
    )
    write_cosignatory_modification(
        t,
        1,
        unhexlify(
            "d88c6ee2a2cd3929d0d76b6b14ecb549d21296ab196a2b3a4cb2536bcce32e87"
        ),
    )
    write_minimum_cosignatories(t, 2)
    self.assertEqual(
        hashlib.sha3_256(t, keccak=True).digest(),
        unhexlify(
            "1fbdae5ba753e68af270930413ae90f671eb8ab58988116684bac0abd5726584"
        ),
    )