public async Task TestCache()
        {
            bool store = await provider.StoreDataAsync(new AvData()
            {
                Title  = "AV-Test",
                Number = "AV-Test"
            });

            Assert.IsTrue(store);
            AvData data = await provider.GetDataAsync("AV-Test");

            Assert.IsNotNull(data);
            Assert.AreEqual("AV-Test", data.Title);
        }
        public async Task TestGetNullContent2()
        {
            AvData data = await provider.GetDataAsync(null);

            Assert.IsNull(data);
        }