# `BCCollectionViewDelegate groupHeaderHeightForCollectionView:group:`

*Instance Method*

## Declaration

```swift
optional func groupHeaderHeight(for collectionView: BCCollectionView!, group: BCCollectionViewGroup!) -> UInt
```

```objc
- (NSUInteger) groupHeaderHeightForCollectionView:(BCCollectionView *) collectionView group:(BCCollectionViewGroup *) group;
```

```python
groupHeaderHeightForCollectionView_group_(collectionView: BCCollectionView, group: BCCollectionViewGroup) -> int
```