Assertion: operation | /r/HasProperty | cancelled
Facets:
value: before starting the task
type: TEMPORAL
Source sentences:
text: Your start() method should also check to see if the operation itself was cancelled before actually starting the task.
text: Finished key path lets clients know that an operation finished its task successfully or was cancelled and is exiting.
text: If you replace the start() method or your operation object, you must also replace the is Finished property and generate KVO notifications when the operation finishes executing or is cancelled.