ReadonlyanchorOptional ReadonlyanglePolar span in degrees; a full turn excludes the coincident last copy.
ReadonlycountItems including the original, at least two.
Optional ReadonlycursorOptional ReadonlydistanceTyped linear spacing, or total span with fit; omitted follows cursor.
Optional ReadonlyfitReadonlymode
Storey-local direction start (linear) or rotation centre (polar), metres.