It is interesting that NSFilePromiseProvider is being highlited and featured in several documents like: https://docs.microsoft.com/en-us/xamarin/mac/platform/introduction-to-macos-sierra/modern-cocoa-apps, while it seems not to be fully implemented and possibly not even useful in the current implementation, as at least this API is not implemented and it seems to be critical: https://developer.apple.com/documentation/appkit/nsfilepromiseproviderdelegate/1644244-filepromiseprovider?language=objc
Anyway any sample code for Xamarin (truth to be code not much samples for objective C/swift either)? Especially samples with NSTableView would be appreciated.