 	// MARK: Account API
 	
 	func cancelAll(for account: Account) {
-		// TODO: Implement me please
+		operationQueue.cancelAllOperations()
 	}
 	
 	func refreshAll(for account: Account, completion: @escaping (Result<Void, Error>) -> Void) {

	private let database: SyncDatabase
	
	private weak var currentSyncAllOperation: FeedlySyncAllOperation?
	
	init(dataFolder: String, transport: Transport?, api: FeedlyAPICaller.API) {
		
		if let transport = transport {
			caller = FeedlyAPICaller(transport: transport, api: api)
			
		} else {
			

		
		currentSyncAllOperation = operation
		
		operationQueue.addOperation(operation)
	}
	
	func sendArticleStatus(for account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
