         }
     }
     
+    private func updateDisplayStyle(displayStyle: DisplayStyle) {
+        
+        switch displayStyle {
+        case .RoundRectangle:
+            return
+            
+        default:
+            return
+        }
+    }
+    
     // MARK: Public
     
     /**

         customisation.
         */
        case Custom
    }
    
    // MARK: Defaults

        }
    }
    
    /**
     The display style to use for the layout. Defaults to Standard.
     */
    public var displayStyle: DisplayStyle = DisplayStyle.Standard {
        willSet (newDisplayStyle) {
            if newDisplayStyle != self.displayStyle {
                self.updateDisplayStyle(newDisplayStyle)
            }
        }
    }
    
    // MARK: Init
    
    /**
