 
      - returns: A Swiftly object representing the desired layout.
      */
-    public static func HorizontalMargins(item: AnyObject? = nil) -> Swiftly {
-        return Swiftly(attributes: [.Left, .Right], otherAttributes: [.LeftMargin, .RightMargin], toItem: item)
+    public static func horizontalMargins(_ item: AnyObject? = nil) -> Swiftly {
+        return Swiftly(attributes: [.left, .right], toItem: item, otherAttributes: [.leftMargin, .rightMargin])
     }
     /**
     A combined layout representing the top and bottom sides of a view's alignment rectangle.


    - returns: A Swiftly object representing the desired layout.
    */
    public static func Vertical(item: AnyObject? = nil) -> Swiftly {
        return Swiftly(attributes: [.Top, .Bottom], toItem: item)
    }
    /**
     A combined layout representing the top and bottom sides of a view's margin alignment rectangle.


    - returns: A Swiftly object representing the desired layout.
    */
    public static func center(_ item: AnyObject? = nil) -> Swiftly {
        return Swiftly(attributes: [.centerX, .centerY], toItem: item)
    }
    /**
    A combined layout representing the height and width of a view's alignment rectangle.
