After updating Xcode to version 16, all functions that I used to create FetchDescriptor return with a warning:

Type ‘ReferenceWritableKeyPath<Station, Optional>’ does not
conform to the ‘Sendable’ protocol; this is an error in the Swift 6
language mode

Minimum example:

@Model public class Station {
    var stationKey: Int16? = 0
}

extension Station {
    
    static func allFD()->FetchDescriptor<Station> {
        let predicate = #Predicate<Station> {value in
            true
        }
        
        let descriptor=FetchDescriptor<Station>(predicate: predicate, sortBy: [SortDescriptor(Station.stationKey)])
        return descriptor
    }

The idea to have “FetchDescriptors” defined in an extension was to be able to use them both in Views and “background” code.

But now I am not sure how to proceed if I want to sort as well.

Thank you for your comments and ideas.