public void CanCreateAndUseInternalTypes()
        {
            var id       = Guid.NewGuid();
            var expected = Guid.NewGuid().ToString();

            // Proxy is used here in a public xUnit test class in order to run against the Test<T> that points to an internal type
            _proxy.Service <IInternalScope>().GetValue(id).Returns(expected);

            var actual = _proxy.SUT.GetValue(id);

            actual.Should().Be(expected);
        }