XMPPMessageArchivingCoreDataStorage *messageArchivingCoreDataStorage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
self.messageArchiving = [[XMPPMessageArchiving alloc] initWithMessageArchivingStorage:messageArchivingCoreDataStorage dispatchQueue:dispatch_get_main_queue()];
[self.messageArchiving activate:self.stream];
self.managedObjectContext = [messageArchivingCoreDataStorage mainThreadManagedObjectContext];
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