     
     - returns: A layout constraint.
     */
-    public var setBottom: LALayoutConstraint? {
-        get {
-            if self.view.superview != nil {
-                return LALayoutConstraint(item: self.view, attribute: .Bottom, relatedBy: .Equal, toItem: self.view.superview, attribute: .Bottom, multiplier: 1, constant: 0)
-            } else {
-                return nil
-            }
+    public var setBottom: LALayoutConstraint {
+        get {
+            return LALayoutConstraint(item: self.view, attribute: .Bottom, relatedBy: .Equal, toItem: self.view.superview, attribute: .Bottom, multiplier: 1, constant: 0)
         }
     }
     

    
    - returns: A layout constraint.
    */
    public var setHeight: LALayoutConstraint? {
        get {
            if self.view.superview != nil {
                return LALayoutConstraint(item: self.view, attribute: .Height, relatedBy: .Equal, toItem: self.view.superview, attribute: .Height, multiplier: 1, constant: 0)
            } else {
                return nil
            }
        }
    }
    

    
    - returns: A layout constraint.
    */
    public var setBaseline: LALayoutConstraint {
        get {
            return LALayoutConstraint(item: self.view, attribute: .Baseline, relatedBy: .Equal, toItem: self.view.superview, attribute: .Baseline, multiplier: 1, constant: 0)
        }
    }
    
    public func fillParent() -> (left: LALayoutConstraint, right: LALayoutConstraint, width: LALayoutConstraint, height: LALayoutConstraint) {
        return (left: self.setLeft.addToSuperview(), right: self.setRight.addToSuperview(), width: self.setWidth.addToSuperview(), height: self.setHeight.addToSuperview())
    }
    
    public func fillView(view: UIView) -> (left: LALayoutConstraint, right: LALayoutConstraint, width: LALayoutConstraint, height: LALayoutConstraint) {
        return (left: self.setLeft.ofView(view).addToSuperview(), right: self.setRight.ofView(view).addToSuperview(), width: self.setWidth.ofView(view).addToSuperview(), height: self.setHeight.ofView(view).addToSuperview())
    }
    
    public func sizeOfParent() -> (width: LALayoutConstraint, height: LALayoutConstraint) {
        return (width: self.setWidth.addToSuperview(), height: self.setHeight.addToSuperview())
    }
    
    public func sizeOfView(view: UIView) -> (width: LALayoutConstraint, height: LALayoutConstraint) {
        return (width: self.setWidth.ofView(view).addToSuperview(), height: self.setHeight.ofView(view).addToSuperview())
    }
    
    public func centerInParent() -> (centerX: LALayoutConstraint, centerY: LALayoutConstraint) {
        return(centerX: self.setCenterX.addToSuperview(), centerY: self.setCenterY.addToSuperview())
    }
    
    public func centerInView(view: UIView) -> (centerX: LALayoutConstraint, centerY: LALayoutConstraint) {
        return(centerX: self.setCenterX.ofView(view).addToSuperview(), centerY: self.setCenterY.ofView(view).addToSuperview())
    }
}

