TGRTimeline.m

- (NSManagedObjectModel *)managedObjectModel
{
    if (!_managedObjectModel) {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"Twitter" ofType:@"mom"];
        
        if (!path) {
            path = [[NSBundle mainBundle] pathForResource:@"Twitter" ofType:@"momd"];
        }
        
        NSURL *url = [NSURL fileURLWithPath:path];
        
        _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:url];
    }
    
    return _managedObjectModel;
}