         self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-(>=margin)-[actionGroupView]-margin-[cancelGroupView]-margin-|",
             options: .DirectionLeadingToTrailing,
             metrics: ["margin": self.verticalMargin],
-            views: ["actionGroupView": self.actionGroupView, "cancelGroupView": self.cancelGroupView]) 
+            views: ["actionGroupView": self.actionGroupView, "cancelGroupView": self.cancelGroupView])
         )
     }
 

        var constraints: [NSLayoutConstraint] = []
        var height = self.controlHeight
        if view == self.titleView {
            height = self.titleHeight
        }
        if let sibling = sibling {
            constraints.appendContentsOf(NSLayoutConstraint.constraintsWithVisualFormat("V:[view(height)]-spacing-[sibling]",

            self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-margin-[groupView]-margin-|",
                options: .DirectionLeadingToTrailing,
                metrics: ["margin": self.horizontalMargin],
                views: ["groupView": groupView])
            )
        }

