public void Should_Execute_Template()
            {
                // Given
                TestNavigationViewModel sut = new TestNavigationViewModelFixture();

                // When
                sut.Initialize.Execute().Subscribe();

                // Then
                sut.Overriden.Should().BeTrue();
            }
            public void Should_Have_Parameter()
            {
                // Given
                TestNavigationViewModel sut = new TestNavigationViewModelFixture();

                // When
                ((INavigating)sut).WhenNavigatingTo(new NavigationParameter()).Subscribe();

                // Then
                sut.NavigatingToParameter.Should().BeAssignableTo <INavigationParameter>();
            }