public void Test3()
        {
            StateRepositoryRoot repository = new StateRepositoryRoot(new MemoryDictionarySource());

            uint160 cow   = 100;
            uint160 horse = 2000;

            byte[] cowCode   = "A1A2A3".HexToByteArray();
            byte[] horseCode = "B1B2B3".HexToByteArray();

            repository.SetCode(cow, cowCode);
            repository.SetCode(horse, horseCode);

            Assert.Equal(cowCode, repository.GetCode(cow));
            Assert.Equal(horseCode, repository.GetCode(horse));
        }