         :returns: Batch update result.
     */
     class func batchUpdate(predicate predicate: NSPredicate? = nil, properties: [NSObject : AnyObject]? = nil, resultType: NSBatchUpdateRequestResultType = .StatusOnlyResultType, context: NSManagedObjectContext = AERecord.defaultContext) -> NSBatchUpdateResult? {
-        // create request
         let request = NSBatchUpdateRequest(entityName: entityName)
-        // set request parameters
         request.predicate = predicate
         request.propertiesToUpdate = properties
         request.resultType = resultType
-        // execute request
+
         var batchResult: NSBatchUpdateResult? = nil
-        // TODO: async error throwing
+
         context.performBlockAndWait { () -> Void in
             do {
                 if let result = try context.executeRequest(request) as? NSBatchUpdateResult {

    }
    
    // MARK: Context Save
    
    // TODO: async error throwing
    func saveContext(context: NSManagedObjectContext? = nil) {
        let moc = context ?? defaultContext
        moc.performBlock { () -> Void in

                print(error)
            }
        }

        return batchResult
    }
    
