A Boolean value that indicates the entire remaining length of the resource from the offest to the end of the resource is being requested.
- iOS 9.0+
- macOS 10.11+
- Mac Catalyst 13.0+
- tvOS 9.0+
When this property is true, you should disregard the value of requestedLength and incrementally provide as much data, starting from the requested offset, as the resource contains. Continue until all available data was successfully loaded, the request was cancelled, or an error occurs.