class
 Toolkit
            assets:ToolkitAssets        
                            autoScale:Bool        
                            autoScaleDPIThreshold:Int        
                            backendProperties:Properties        
                            initialized:Bool        
                            nativeConfig:GenericConfig        
                            pixelsPerRem:Int        
                            properties:        
                            roundScale:Bool        
                            scale:Float        
                            scaleX:Float        
                            scaleY:Float        
                            screen:Screen        
                            styleSheet:CompositeStyleSheet        
                            theme:String        
                            build():Void        
                            callLater(fn:():Void):Void        
                            init(options:Null<> = null):Void        
                    