Class A

test/ext/test_mutable.py:255–262

        class="st">""class="st">"test class="cm">#9676"class="st">""

        class A(decl_base):
            __tablename__ = class="st">"a"

            id: Mapped[int] = mapped_column(primary_key=True)

            json: Mapped[Dict[str, Any]] = mapped_column(
                MutableDict.as_mutable(JSON())
            )

        class B(A):
            pass