public void TestLoadHidden()
        {
            var configurationService = new EnvironmentService();

            var memoryConfiguration = new MemoryPropertySource()
                                      .AddProperty("test.password.$hidden", "MTMzN2wzM3Q=");

            configurationService.PropertySources.Add(memoryConfiguration);
            configurationService.Refresh();


            Assert.AreEqual("1337l33t", configurationService.Configuration.Get("test.password"));
        }