TGRTwitterUser.m

+ (NSFetchRequest *)fetchRequestForTwitterUserWithIdentifier:(NSNumber *)identifier
{
    static dispatch_once_t onceToken;
    static NSPredicate *predicateTemplate;
    
    dispatch_once(&onceToken, ^{
        predicateTemplate = [NSPredicate predicateWithFormat:@"identifier == $IDENTIFIER"];
    });
    
    NSPredicate *predicate = [predicateTemplate predicateWithSubstitutionVariables:
                              [NSDictionary dictionaryWithObject:identifier forKey:@"IDENTIFIER"]];
    
    NSFetchRequest *fetchRequest = [self fetchRequest];
    [fetchRequest setPredicate:predicate];
    
    return fetchRequest;
}