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Manifold not defined

Using SageMath-9.6 (v1.4.2 for arm64) under macOS 12.5.1, in a new notebook I evaluated:

Manifold(2, 'M')

and get error:

NameError Traceback (most recent call last) /var/folders/r2/v_ly_rjj6_v1qpzx4kqy_mqr0000gn/T/ipykernel_37595/ in <module> ----> 1 Manifold(2, 'M')

NameError: name 'Manifold' is not defined

According to the docs at, "all SageManifolds code is included in SageMath..."

What's wrong?