      - returns: self
      */
     @nonobjc
+    @discardableResult
     public func pinRight(to support: UILayoutSupport,
                             _ attribute: NSLayoutAttribute = .right,
                               relation: NSLayoutRelation = .equal,

     - returns: self
     */
    @nonobjc
    public func pinLeft(to support: UILayoutSupport,
                           _ attribute: NSLayoutAttribute = .left,
                             relation: NSLayoutRelation = .equal,

     - returns: self
     */
    @nonobjc
    @discardableResult
    public func pinCenterY(to support: UILayoutSupport,
                              _ attribute: NSLayoutAttribute = .centerY,
                                relation: NSLayoutRelation = .equal,
