public void MergeTablePerConcreteClassEntities()
		{
			var destination = new ExplicitDeclarationsHolder();
			var source = new ExplicitDeclarationsHolder();
			source.AddAsTablePerConcreteClassEntity(typeof (MyClass));

			destination.Merge(source);
			destination.TablePerConcreteClassEntities.Should().Have.Count.EqualTo(1);
		}