             borderView.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
             borderView.topAnchor.constraint(equalTo: topAnchor, constant: top).isActive = true
             bottomAnchor.constraint(equalTo: borderView.bottomAnchor, constant: bottom).isActive = true
-       case .frame:
+        case .frame:
             let frame = CGRect(x: 0,
                                y: top,
                                width: CGFloat(border.thickness),

            By default, 0.
     - parameter rightOffset: Offset from the view's right border to where the border should start.
            By default, 0.
     - parameter layout: Enum indicating whether to use constraints or frames. By default, constraints.
     
     - note: If you decide to use constraints to determine the size, self's frame doesn't need to be final.
             Because of this, it can be used in `loadView()`, `viewDidLoad()` or `viewWillAppear(animated:)`.

            By default, 0.
     - parameter rightOffset: Offset from the view's right border to where the border should start.
            By default, 0.
     - parameter layout: Enum indicating the layout mode. By default, .constraints.
     
     - note: If you decide to use constraints to determine the size, self's frame doesn't need to be final.
             Because of this, it can be used in `loadView()`, `viewDidLoad()` or `viewWillAppear(animated:)`.
