#pragma warning disable CA1822
        public void TestToString()
#pragma warning restore CA1822
        {
            List <TokenResponseMessage> messages = new List <TokenResponseMessage>()
            {
                new TokenResponseMessage("a", "b")
            };
            TokenResponse ut = new TokenResponse(messages);

            Assert.True(ut.ToString().Contains("a"), "serialized TokenResponse didn't contain expected message value 'a'");
            Assert.True(ut.ToString().Contains("b"), "serialized TokenResponse didn't contain expected message value 'b'");
        }