Class Foo

test/ext/test_mutable.py:1261–1265

            unrelated_data = Column(String(50))

        class Foo(AbstractFoo):
            __tablename__ = "foo"
            column_prop = column_property(
                func.lower(AbstractFoo.unrelated_data)
            )

        assert Foo.data.property.columns[0].type is not AbstractFoo.data.type