Container Flex

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    xmlns:mx="http://www.adobe.com/2006/mxml"
    layout="absolute">
    
        
            
    
                private function changeScrollToShowChild():void
                {
                    vbox.verticalScrollPosition = (getChildrenHeight((comboBox.selectedItem as Number)+1)) - vbox.height + 40;
                }
                private function getChildrenHeight(index:int):Number
                {
                    var i:int = 0;
                    var sumHeight:Number = 0;
                    while(i                        sumHeight += vbox.getChildAt(i).height;
                        i = i +1;
                    }
                    return sumHeight;
                }
          
        
        
            
                
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                         verticalScrollPolicy="off" paddingLeft="50">