public void SetLazy()
        {
            var subClass = typeof(Inherited);
            var mapdoc = new HbmMapping();
            var mapper = new SubclassMapper(subClass, mapdoc);
            mapper.Lazy(true);

            var hbmEntity = mapdoc.SubClasses[0];

            hbmEntity.UseLazy.Should().Not.Have.Value();

            mapper.Lazy(false);
            hbmEntity.UseLazy.Should().Be(false);
        }