The block to execute for each share participant that has been fetched from the server.
- iOS 10.0+
- macOS 10.12+
- Mac Catalyst 13.0+
- tvOS 10.0+
- watchOS 3.0+
Each time the block is executed, it is executed serially with respect to the other progress blocks of the operation.
If you intend to use this block to process results, set it before executing the operation or submitting the operation object to a queue.