TitledCollectionView+UICollectionViewDelegate.swift

extension TitledCollectionView: UICollectionViewDelegate {
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        updateControllerDelegate(with: indexPath.item)
    }
    
    private func updateControllerDelegate(with item: Int) {
        switch self.produce {
        case .fruit:
            let fruit = Fruit.allCases[item]
            delegate?.itemWasSelected(fruit)
        case .vegetable:
            let vegetable = Vegetable.allCases[item]
            delegate?.itemWasSelected(vegetable)
        default: // nil value
            break
        }
        
    }
}