 import Cocoa
 
 class SBBLKGUIScrollView: NSScrollView {
-    override var horizontalScroller: NSScroller! {
+    override var horizontalScroller: NSScroller? {
         get { return super.horizontalScroller }
         set(scroller) {
             super.horizontalScroller = scroller
         }
     }
-    override var verticalScroller: NSScroller! {
+    override var verticalScroller: NSScroller? {
         get { return super.verticalScroller }
         set(scroller) {
             super.verticalScroller = scroller

            newScroller.controlSize = scroller.controlSize
            self.horizontalScroller = newScroller
      	}
    }
    
    /*

        self.initialize()
    }
    
    class func _horizontalScrollerClass() -> AnyClass {
        return SBBLKGUIScroller.self
    }
    
    class func _verticalScrollerClass() -> AnyClass {
        return SBBLKGUIScroller.self
    }

    func initialize() {
        contentView = self.contentView
        self.contentView = SBBLKGUIClipView(frame: contentView.frame)
        
        /*
      	self.hasVerticalScroller = hasVerticalScroller
      	self.hasHorizontalScroller = hasHorizontalScroller
        if self.hasVerticalScroller {
