     private let refreshControl = UIRefreshControl()
     private var start = -1
     private var end = -1
-
-    private var errorText:UITextView?
 
     /**
         Call this to load new images. Optionally specify a `ImageLoadDelegate`

        guard let dataSource = feedDataSource else {
            return .zero
        }
        let screenRect = UIScreen.main.bounds
        let screenWidth = screenRect.size.width
        let cellWidth = screenWidth / CGFloat(dataSource.getCellsPerRow())
        let size = CGSize(width: cellWidth, height: cellWidth)
        return size
    }

    open override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {

        }
    }

    private final func newCellVisible(at index: Int) {
        if index < cellData.count {
            // set cell with image
            cellData[index].cellDidBecomeVisible()
        }
    }
}
