cancellationHandler
The block to invoke when canceling progress.
Declaration
var cancellationHandler: (@Sendable () -> Void)? { get set }Discussion
If the receiver is a suboperation of another progress object, the system invokes the cancellationHandler block when canceling the containing progress object.
Special Considerations
You’re responsible for canceling any work for the progress object.
You can invoke the cancellation handler on any queue. If you must do work on a specific queue, dispatch to that queue from within the cancellation handler block.