public void GetWithKeyValuePair()
        {
            var kv = Kv.Create(KvpSrc);

            kv.Key.Is(KvpSrc.Key);
            kv.Value.Is(KvpSrc.Value);
        }
        public void GetWithValueTuple()
        {
            var kv = Kv.Create(VtpSrc);

            kv.Key.Is(VtpSrc.Item1);
            kv.Value.Is(VtpSrc.Item2);
        }
        public void GetWithSpecifiedParameters()
        {
            var kv = Kv.Create("test", 66);

            kv.Key.Is("test");
            kv.Value.Is(66);
        }
        public void GetWithValueTupleWithNamedProperty()
        {
            (int k, string v)vtp = (100, "test");
            var kv = Kv.Create(vtp);

            kv.Key.Is(vtp.k);
            kv.Value.Is(vtp.v);
        }