if groupItems.count > 0 {
            let first = groupItems[0]
            let contentWidthConstraints = NSLayoutConstraint(item: scrollContentView, attribute: .width,
                relatedBy: .equal,  toItem: first, attribute: .width, multiplier: CGFloat(groupItems.count),
                constant: groupItemPadding * (CGFloat(groupItems.count * 2)))
            scrollContentView.addConstraint(contentWidthConstraints)
        }