func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! LessonsVCCell

        // set cellTitle label text
        cell.cellTitle.text = lessonsArray[indexPath.row].name

        // set cellDescription label text
        cell.cellDescription.text = lessonsArray[indexPath.row].details

        if lessonsArray[indexPath.row].blocked == 1 {

            // show cellImg view - does it get hidden somewhere ???
            cell.cellImg.isHidden = false

            // show cellBtn button
            cell.cellBtn.isHidden = false

            //set cellImg image
            cell.cellImg.image = UIImage(systemName:"lock.fill")

            // create a new UIImageView, set its "color" -- but then do nothing with it ????
            let cellImg = UIImageView(image: UIImage(named: "your_image_name"))
            cellImg.setImageColor(color: UIColor.systemOrange)

        } else {

            // hide cellBtn button
            cell.cellBtn.isHidden = true

            //set cellImg image
            cell.cellImg.image = UIImage(named:"RightAnswerNew")

        }

        return cell

    }