Swift 4.1 Cannot override with a stored property '...Constraint'

[NikKovIos]

class AssetVideoScrollView: UIScrollView {
    private var widthConstraint: NSLayoutConstraint?

and the same error with

  @IBDesignable public class TrimmerView: AVAssetTimeSelector {
    private var leftConstraint: NSLayoutConstraint?
    private var rightConstraint: NSLayoutConstraint?

You can check it in Yummypets/YPImagePicker@4fea39d

[HHK1]

Those are stored properties, private moreover, you are not supposed to override them.

[NikKovIos]

But they are in your library https://github.com/prynt/PryntTrimmerView/blob/master/PryntTrimmerView/Classes/Trimmer/PryntTrimmerView.swift
The compiler warning on them.

[HHK1]

But they are in your library https://github.com/prynt/PryntTrimmerView/blob/master/PryntTrimmerView/Classes/Trimmer/PryntTrimmerView.swift

The only thing I'm overriding in this class are the methods to setup the subviews and the constraints:
setupSubviews and constrainAssetPreview.

The compiler warning on them.

Where ? In your project or in this library ?

[calsmith]

+1 importing the raw source files into a project (i.e. without cocoapods) causes the following build errors:
"Cannot override with a stored property 'widthConstraint'" AssetVideoScrollView.swift line 12 for each of the constraints in Swift 5 Xcode 12.5. Is there a workaround for this?