public void SetSqlDelete()
        {
            var subClass = typeof(Inherited);
            var mapdoc = new HbmMapping();
            var mapper = new SubclassMapper(subClass, mapdoc);
            mapper.SqlDelete("blah");

            var hbmEntity = mapdoc.SubClasses[0];

            hbmEntity.SqlDelete.Should().Not.Be.Null();
            hbmEntity.SqlDelete.Text[0].Should().Be("blah");
        }