cellForItemAt.swift

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    // Working with functions categories collection view
    if collectionView == self.functionsCategoriesCollectionView {
        let cellFunctionsCategories = collectionView.dequeueReusableCell(withReuseIdentifier: "cellCat", for: indexPath) as! DevicePageFunctionsCategoriesCVCell
            cellFunctionsCategories.cellTitleContent.text = ICDatabase.objects(FunctionCategory.self)[indexPath.row].name.uppercased()
        
        cellFunctionsCategories.setGradientBorder(width: 10, colors: [UIColor(red: 127.0/255.0, green: 127.0/255.0, blue: 127.0/255.0, alpha: 1.0), UIColor(red: 47.0/255.0, green: 47.0/255.0, blue: 47.0/255.0, alpha: 1.0)])
        
        return cellFunctionsCategories
        
    }
        
}