How to set Headerview

[PKhunt]

I want to set Headerview in BidirectionalCollectionViewLayout But I am not able to set headerview.

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [self.collectionView registerNib:[UINib nibWithNibName:@"DABrandListHeaderView" bundle:nil] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"HeaderView"];
}


- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
    if ([kind isEqualToString:UICollectionElementKindSectionHeader]) {
    
        DABrandListHeaderView *reusableview = (DABrandListHeaderView *)[collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"HeaderView" forIndexPath:indexPath];
    
        [reusableview.titleLabel setText:[[self.itemsArray objectAtIndex:indexPath.section] valueForKey:@"section"]];
    
        return reusableview;
    }

    return nil;
}

I have put this code but this code is not being called. Please help me so I can set header in collection view.