How to use SomeDerivedDerivedClass class of describe_OtherNameSpace package

...95        {96            GivenDllContains(typeof(SomeClass),97                typeof(SomeDerivedClass),98                typeof(SomeClassInOtherNameSpace),99                typeof(SomeDerivedDerivedClass));100        }101        [Test]102        public void it_should_find_all_specs_if_regex_is_not_specified()103        {104            GivenFilter("");105            TheSpecClasses()106                .should_contain(typeof(SomeClass))107                .should_contain(typeof(SomeDerivedClass))108                .should_contain(typeof(SomeClassInOtherNameSpace));109        }110        [Test]111        public void it_should_find_specs_for_derived_class_and_include_base_class()112        {113            GivenFilter("DerivedClass$");114            TheSpecClasses()115                .should_contain(typeof(SomeClass))116                .should_contain(typeof(SomeDerivedClass))117                .should_contain(typeof(SomeDerivedDerivedClass))118                .should_not_contain(typeof(SomeClassInOtherNameSpace));119            TheSpecClasses().Count().should_be(3);120        }121        [Test]122        public void it_should_find_specs_that_contain_namespace()123        {124            GivenFilter("describe_SomeNameSpace");125            TheSpecClasses()126                .should_contain(typeof(SomeClass))127                .should_contain(typeof(SomeDerivedClass))128                .should_not_contain(typeof(SomeClassInOtherNameSpace));129        }130        [Test]131        public void it_should_find_distinct_specs()132        {133            GivenFilter("Derived");134            TheSpecClasses()135                .should_contain(typeof(SomeClass))136                .should_contain(typeof(SomeDerivedClass))137                .should_contain(typeof(SomeDerivedDerivedClass));138            TheSpecClasses().Count().should_be(3);139        }140    }141    public class when_finding_specs142    {143        protected void GivenDllContains(params Type[] types)144        {145            reflector = new Mock<IReflector>();146            reflector.Setup(r => r.GetTypesFrom()).Returns(types);147            someDLL = "an nspec project dll";148            finder = new SpecFinder(reflector.Object);149        }150        protected void GivenFilter(string filter)151        {152            finder = new SpecFinder(reflector.Object, filter);153        }154        155        protected IEnumerable<Type> TheSpecClasses()156        {157            return finder.SpecClasses();158        }159        protected ISpecFinder finder;160        protected Mock<IReflector> reflector;161        protected string someDLL;162    }163}164namespace describe_SomeNameSpace165{166    class SomeClass : nspec167    {168        void context_method()169        {170            171        }172    }173    class SomeDerivedClass : SomeClass174    {175        void context_method()176        {177        }178    }179    class SomeDerivedDerivedClass : SomeClass180    {181        void context_method()182        {183        }184    }185}186namespace describe_OtherNameSpace187{188    class SomeClassInOtherNameSpace : nspec189    {190        void context_method()191        {192        }193    }...