Error while attempting to use the CSSFormatResolver Class in Flash CS4

Question

Hello,
While trying to work with a revised version of the CSSFormatResolver class (created by timoisalive and posted on this thread) the compiler threw the following error:
1061: Call to a possibly undefined method getChildAtIndex through a reference with static type flashx.textLayout.elements:FlowGroupElement.
The method originates from within the invalidate() method of the CSSFormatResolver class.
public function invalidate(target:Object):void {       
     delete _textLayoutFormatCache[target];      
     var blockElem:FlowGroupElement = target as FlowGroupElement;      
     if(blockElem) {          
          for(var idx:int = 0; idx < blockElem.numChildren; idx++)                          invalidate(blockElem.getChildAtIndex(idx));          
If I comment the for loop I can get the example to run, but that seems to seriously affect the way the styles are interpreted...
The example files are attached below.
Any suggestions?
Thank you in advance.

Answer 1

There is no FlowGroupElement.getChildAtIndex method.
There are these two:
getChildAt(index:int):FlowElement
Returns the FlowElement child at the specified index.
FlowGroupElement
getChildIndex(child:FlowElement):int
Searches in children for the specified FlowElement object and returns its index position.
FlowGroupElement
I think you meant getChildAt.
Hope that helps,
Rich