In my `UICollectionView` I've set different heights for different `cell` item using the delegate method:

```
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

    switch indexPath.item {
    case 0:
          return CGSize(width: view.frame.width, height: view.frame.width/2)
    case 1:
        return CGSize(width: view.frame.width, height: 250)
    case 2:
        return CGSize(width: view.frame.width, height: view.frame.width/2)
    default:
         return CGSize(width: view.frame.width, height: view.frame.width)
    }

}

```

Now given a `indexPath`, I would like to get the height I've previously assigned for a specific `cell` Item .