     func pinEdgesToSuperview(distance: CGFloat) -> [NSLayoutConstraint] {
         let superview: UIView? = self.superview
         assert(superview != nil, "View's superview must not be nil")
-        let left = NSLayoutConstraint(item: self, attribute: .Left, relatedBy: .Equal, toItem: superview, attribute: .Left, multiplier: 1, constant: distance)
-        let right = NSLayoutConstraint(item: self, attribute: .Right, relatedBy: .Equal, toItem: superview, attribute: .Right, multiplier: 1, constant: distance)
-        let top = NSLayoutConstraint(item: self, attribute: .Top, relatedBy: .Equal, toItem: superview, attribute: .Top, multiplier: 1, constant: distance)
-        let bottom = NSLayoutConstraint(item: self, attribute: .Bottom, relatedBy: .Equal, toItem: superview, attribute: .Bottom, multiplier: 1, constant: distance)
+        let left = NSLayoutConstraint(item: self, attribute: .Left, toItem: superview, constant: distance)
+        let right = NSLayoutConstraint(item: self, attribute: .Right, toItem: superview, constant: distance)
+        let top = NSLayoutConstraint(item: self, attribute: .Top, toItem: superview, constant: distance)
+        let bottom = NSLayoutConstraint(item: self, attribute: .Bottom, toItem: superview, constant: distance)
         return [left, right, top, bottom]
     }
 
     // MARK: Same dimension
 
-    func matchDimension(dimension: NSLayoutAttribute, otherView: UIView) -> NSLayoutConstraint {
+    func matchDimension(dimension: NSLayoutAttribute, toItem view: UIView) -> NSLayoutConstraint {
         assert(dimension == .Width || dimension == .Height, "You can match the width or the height of a view, no other attribute is accepted")
-        return NSLayoutConstraint(item: self, attribute: dimension, relatedBy: .Equal, toItem: otherView, attribute: dimension, multiplier: 1, constant: 0)
+        return NSLayoutConstraint(item: self, attribute: dimension, toItem: view)
     }
 
     func matchHeightAndWidth() -> NSLayoutConstraint {

        return [width, height]
    }
}

        let superview: UIView? = self.superview
        assert(superview != nil, "View's superview must not be nil")
        assert(axis == .CenterX || axis == .CenterY, "You can center a view horizontally or vertically, no other attribute is accepted")
        return NSLayoutConstraint(item: self, attribute: axis, toItem: superview)
    }

    // MARK: Pin Edges to Superview
