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

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

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