Observe and control a long-running Manifold evaluation. Pass to
Manifold.statusWithContext() to observe progress and optionally request
cancellation. Safe to read/write from any thread/worker.
Cancellation is permanent for a Manifold: once cancelled and detected,
the Manifold's status becomes 'Cancelled' and stays 'Cancelled'.
Observe and control a long-running Manifold evaluation. Pass to Manifold.statusWithContext() to observe progress and optionally request cancellation. Safe to read/write from any thread/worker.
Cancellation is permanent for a Manifold: once cancelled and detected, the Manifold's status becomes 'Cancelled' and stays 'Cancelled'.