NSFileProviderEnumerator A protocol for enumerating items and changes. Declarationprotocol NSFileProviderEnumerator : NSObjectProtocol Mentioned inDefining Your File Provider’s ContentSynchronizing the File Provider Extension TopicsEnumerating Items and ChangesenumerateItems(for:startingAt:)enumerateChanges(for:from:)currentSyncAnchor(completionHandler:)invalidate() RelationshipsInherits FromNSObjectProtocolInherited ByNSFileProviderPendingSetEnumerator